Home / 20,581.32-28,402.02-11,149.72

Finding the Fourth Proportional to 20,581.32, 28,402.02 and 11,149.72

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Solution

The fourth proportional to 20,581.32, 28,402.02 and 11,149.72 is: 15,386.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.32 : 28,402.02 = 11,149.72 : x
  2. Step 2: Convert to fraction form
    20,581.32/28,402.02 = 11,149.72/x
  3. Step 3: Cross multiply
    20,581.32x = 28,402.02 × 11,149.72
  4. Step 4: Simplify right side
    20,581.32x = 316,674,570.43
  5. Step 5: Solve for x
    x = 316,674,570.43/20,581.32
  6. Step 6: Final answer
    x = 15,386.50

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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.