Home / 10,089.50-13,916.20-7,781.36

Finding the Fourth Proportional to 10,089.50, 13,916.20 and 7,781.36

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Solution

The fourth proportional to 10,089.50, 13,916.20 and 7,781.36 is: 10,732.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,089.50 : 13,916.20 = 7,781.36 : x
  2. Step 2: Convert to fraction form
    10,089.50/13,916.20 = 7,781.36/x
  3. Step 3: Cross multiply
    10,089.50x = 13,916.20 × 7,781.36
  4. Step 4: Simplify right side
    10,089.50x = 108,286,962.03
  5. Step 5: Solve for x
    x = 108,286,962.03/10,089.50
  6. Step 6: Final answer
    x = 10,732.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.