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Finding the Fourth Proportional to 28,903.98, 43,360.10 and 8,915.15

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Solution

The fourth proportional to 28,903.98, 43,360.10 and 8,915.15 is: 13,373.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,903.98 : 43,360.10 = 8,915.15 : x
  2. Step 2: Convert to fraction form
    28,903.98/43,360.10 = 8,915.15/x
  3. Step 3: Cross multiply
    28,903.98x = 43,360.10 × 8,915.15
  4. Step 4: Simplify right side
    28,903.98x = 386,561,534.14
  5. Step 5: Solve for x
    x = 386,561,534.14/28,903.98
  6. Step 6: Final answer
    x = 13,373.99

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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.