Home / 15,102.19-20,840.72-8,387.63

Finding the Fourth Proportional to 15,102.19, 20,840.72 and 8,387.63

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Solution

The fourth proportional to 15,102.19, 20,840.72 and 8,387.63 is: 11,574.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,102.19 : 20,840.72 = 8,387.63 : x
  2. Step 2: Convert to fraction form
    15,102.19/20,840.72 = 8,387.63/x
  3. Step 3: Cross multiply
    15,102.19x = 20,840.72 × 8,387.63
  4. Step 4: Simplify right side
    15,102.19x = 174,804,102.15
  5. Step 5: Solve for x
    x = 174,804,102.15/15,102.19
  6. Step 6: Final answer
    x = 11,574.75

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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.