Home / 15,311.95-21,129.20-8,597.05

Finding the Fourth Proportional to 15,311.95, 21,129.20 and 8,597.05

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Solution

The fourth proportional to 15,311.95, 21,129.20 and 8,597.05 is: 11,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.95 : 21,129.20 = 8,597.05 : x
  2. Step 2: Convert to fraction form
    15,311.95/21,129.20 = 8,597.05/x
  3. Step 3: Cross multiply
    15,311.95x = 21,129.20 × 8,597.05
  4. Step 4: Simplify right side
    15,311.95x = 181,648,745.87
  5. Step 5: Solve for x
    x = 181,648,745.87/15,311.95
  6. Step 6: Final answer
    x = 11,863.20

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Half scale
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Double scale
Find fourth proportional to 15,312.95, 21,130.57 and 8,598.05
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.