Home / 15,572.81-21,490.50-8,499.65

Finding the Fourth Proportional to 15,572.81, 21,490.50 and 8,499.65

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Solution

The fourth proportional to 15,572.81, 21,490.50 and 8,499.65 is: 11,729.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,572.81 : 21,490.50 = 8,499.65 : x
  2. Step 2: Convert to fraction form
    15,572.81/21,490.50 = 8,499.65/x
  3. Step 3: Cross multiply
    15,572.81x = 21,490.50 × 8,499.65
  4. Step 4: Simplify right side
    15,572.81x = 182,661,728.33
  5. Step 5: Solve for x
    x = 182,661,728.33/15,572.81
  6. Step 6: Final answer
    x = 11,729.53

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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.