Home / 20,642.40-28,486.20-11,210.88

Finding the Fourth Proportional to 20,642.40, 28,486.20 and 11,210.88

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Solution

The fourth proportional to 20,642.40, 28,486.20 and 11,210.88 is: 15,470.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.40 : 28,486.20 = 11,210.88 : x
  2. Step 2: Convert to fraction form
    20,642.40/28,486.20 = 11,210.88/x
  3. Step 3: Cross multiply
    20,642.40x = 28,486.20 × 11,210.88
  4. Step 4: Simplify right side
    20,642.40x = 319,355,369.86
  5. Step 5: Solve for x
    x = 319,355,369.86/20,642.40
  6. Step 6: Final answer
    x = 15,470.84

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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.