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Finding the Fourth Proportional to 26,915.20, 40,356.60 and 13,793.20

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Solution

The fourth proportional to 26,915.20, 40,356.60 and 13,793.20 is: 20,681.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,915.20 : 40,356.60 = 13,793.20 : x
  2. Step 2: Convert to fraction form
    26,915.20/40,356.60 = 13,793.20/x
  3. Step 3: Cross multiply
    26,915.20x = 40,356.60 × 13,793.20
  4. Step 4: Simplify right side
    26,915.20x = 556,646,655.12
  5. Step 5: Solve for x
    x = 556,646,655.12/26,915.20
  6. Step 6: Final answer
    x = 20,681.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.