Home / 15,316.18-21,137.70-8,603.45

Finding the Fourth Proportional to 15,316.18, 21,137.70 and 8,603.45

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Solution

The fourth proportional to 15,316.18, 21,137.70 and 8,603.45 is: 11,873.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.18 : 21,137.70 = 8,603.45 : x
  2. Step 2: Convert to fraction form
    15,316.18/21,137.70 = 8,603.45/x
  3. Step 3: Cross multiply
    15,316.18x = 21,137.70 × 8,603.45
  4. Step 4: Simplify right side
    15,316.18x = 181,857,179.59
  5. Step 5: Solve for x
    x = 181,857,179.59/15,316.18
  6. Step 6: Final answer
    x = 11,873.54

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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.