Home / 20,802.38-28,690.76-15,714.86

Finding the Fourth Proportional to 20,802.38, 28,690.76 and 15,714.86

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Solution

The fourth proportional to 20,802.38, 28,690.76 and 15,714.86 is: 21,674.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.38 : 28,690.76 = 15,714.86 : x
  2. Step 2: Convert to fraction form
    20,802.38/28,690.76 = 15,714.86/x
  3. Step 3: Cross multiply
    20,802.38x = 28,690.76 × 15,714.86
  4. Step 4: Simplify right side
    20,802.38x = 450,871,276.69
  5. Step 5: Solve for x
    x = 450,871,276.69/20,802.38
  6. Step 6: Final answer
    x = 21,674.02

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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.