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Finding the Fourth Proportional to 13,125.90, 18,428.10 and 13,125.90

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Solution

The fourth proportional to 13,125.90, 18,428.10 and 13,125.90 is: 18,428.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.90 : 18,428.10 = 13,125.90 : x
  2. Step 2: Convert to fraction form
    13,125.90/18,428.10 = 13,125.90/x
  3. Step 3: Cross multiply
    13,125.90x = 18,428.10 × 13,125.90
  4. Step 4: Simplify right side
    13,125.90x = 241,885,397.79
  5. Step 5: Solve for x
    x = 241,885,397.79/13,125.90
  6. Step 6: Final answer
    x = 18,428.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.