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Finding the Fourth Proportional to 35,915.40, 53,869.05 and 13,728.29

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Solution

The fourth proportional to 35,915.40, 53,869.05 and 13,728.29 is: 20,590.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,915.40 : 53,869.05 = 13,728.29 : x
  2. Step 2: Convert to fraction form
    35,915.40/53,869.05 = 13,728.29/x
  3. Step 3: Cross multiply
    35,915.40x = 53,869.05 × 13,728.29
  4. Step 4: Simplify right side
    35,915.40x = 739,529,671.08
  5. Step 5: Solve for x
    x = 739,529,671.08/35,915.40
  6. Step 6: Final answer
    x = 20,590.88

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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.