Home / 20,424.16-28,188.36-12,470.98

Finding the Fourth Proportional to 20,424.16, 28,188.36 and 12,470.98

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Solution

The fourth proportional to 20,424.16, 28,188.36 and 12,470.98 is: 17,211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.16 : 28,188.36 = 12,470.98 : x
  2. Step 2: Convert to fraction form
    20,424.16/28,188.36 = 12,470.98/x
  3. Step 3: Cross multiply
    20,424.16x = 28,188.36 × 12,470.98
  4. Step 4: Simplify right side
    20,424.16x = 351,536,473.79
  5. Step 5: Solve for x
    x = 351,536,473.79/20,424.16
  6. Step 6: Final answer
    x = 17,211.80

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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.