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Finding the Fourth Proportional to 15,101.57, 20,839.14 and 8,387.01

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Solution

The fourth proportional to 15,101.57, 20,839.14 and 8,387.01 is: 11,573.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.57 : 20,839.14 = 8,387.01 : x
  2. Step 2: Convert to fraction form
    15,101.57/20,839.14 = 8,387.01/x
  3. Step 3: Cross multiply
    15,101.57x = 20,839.14 × 8,387.01
  4. Step 4: Simplify right side
    15,101.57x = 174,778,075.57
  5. Step 5: Solve for x
    x = 174,778,075.57/15,101.57
  6. Step 6: Final answer
    x = 11,573.50

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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.