Home / 20,392.70-28,139.33-11,897.62

Finding the Fourth Proportional to 20,392.70, 28,139.33 and 11,897.62

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Solution

The fourth proportional to 20,392.70, 28,139.33 and 11,897.62 is: 16,417.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.70 : 28,139.33 = 11,897.62 : x
  2. Step 2: Convert to fraction form
    20,392.70/28,139.33 = 11,897.62/x
  3. Step 3: Cross multiply
    20,392.70x = 28,139.33 × 11,897.62
  4. Step 4: Simplify right side
    20,392.70x = 334,791,014.79
  5. Step 5: Solve for x
    x = 334,791,014.79/20,392.70
  6. Step 6: Final answer
    x = 16,417.20

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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.