Home / 15,494.86-21,384.03-9,121.78

Finding the Fourth Proportional to 15,494.86, 21,384.03 and 9,121.78

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Solution

The fourth proportional to 15,494.86, 21,384.03 and 9,121.78 is: 12,588.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.86 : 21,384.03 = 9,121.78 : x
  2. Step 2: Convert to fraction form
    15,494.86/21,384.03 = 9,121.78/x
  3. Step 3: Cross multiply
    15,494.86x = 21,384.03 × 9,121.78
  4. Step 4: Simplify right side
    15,494.86x = 195,060,417.17
  5. Step 5: Solve for x
    x = 195,060,417.17/15,494.86
  6. Step 6: Final answer
    x = 12,588.72

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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.