Home / 20,743.79-28,626.28-11,312.35

Finding the Fourth Proportional to 20,743.79, 28,626.28 and 11,312.35

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Solution

The fourth proportional to 20,743.79, 28,626.28 and 11,312.35 is: 15,610.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.79 : 28,626.28 = 11,312.35 : x
  2. Step 2: Convert to fraction form
    20,743.79/28,626.28 = 11,312.35/x
  3. Step 3: Cross multiply
    20,743.79x = 28,626.28 × 11,312.35
  4. Step 4: Simplify right side
    20,743.79x = 323,830,398.71
  5. Step 5: Solve for x
    x = 323,830,398.71/20,743.79
  6. Step 6: Final answer
    x = 15,610.96

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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.