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Finding the Fourth Proportional to 15,497.79, 21,391.79 and 9,123.89

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Solution

The fourth proportional to 15,497.79, 21,391.79 and 9,123.89 is: 12,593.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,497.79 : 21,391.79 = 9,123.89 : x
  2. Step 2: Convert to fraction form
    15,497.79/21,391.79 = 9,123.89/x
  3. Step 3: Cross multiply
    15,497.79x = 21,391.79 × 9,123.89
  4. Step 4: Simplify right side
    15,497.79x = 195,176,186.28
  5. Step 5: Solve for x
    x = 195,176,186.28/15,497.79
  6. Step 6: Final answer
    x = 12,593.81

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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.