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Finding the Fourth Proportional to 15,988.91, 23,980.65 and 7,221.77

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Solution

The fourth proportional to 15,988.91, 23,980.65 and 7,221.77 is: 10,831.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,988.91 : 23,980.65 = 7,221.77 : x
  2. Step 2: Convert to fraction form
    15,988.91/23,980.65 = 7,221.77/x
  3. Step 3: Cross multiply
    15,988.91x = 23,980.65 × 7,221.77
  4. Step 4: Simplify right side
    15,988.91x = 173,182,738.75
  5. Step 5: Solve for x
    x = 173,182,738.75/15,988.91
  6. Step 6: Final answer
    x = 10,831.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.