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Finding the Fourth Proportional to 42,602.88, 63,885.66 and 13,013.88

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Solution

The fourth proportional to 42,602.88, 63,885.66 and 13,013.88 is: 19,515.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,602.88 : 63,885.66 = 13,013.88 : x
  2. Step 2: Convert to fraction form
    42,602.88/63,885.66 = 13,013.88/x
  3. Step 3: Cross multiply
    42,602.88x = 63,885.66 × 13,013.88
  4. Step 4: Simplify right side
    42,602.88x = 831,400,312.96
  5. Step 5: Solve for x
    x = 831,400,312.96/42,602.88
  6. Step 6: Final answer
    x = 19,515.12

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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.