Home / 20,645.12-28,490.40-11,214.08

Finding the Fourth Proportional to 20,645.12, 28,490.40 and 11,214.08

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Solution

The fourth proportional to 20,645.12, 28,490.40 and 11,214.08 is: 15,475.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.12 : 28,490.40 = 11,214.08 : x
  2. Step 2: Convert to fraction form
    20,645.12/28,490.40 = 11,214.08/x
  3. Step 3: Cross multiply
    20,645.12x = 28,490.40 × 11,214.08
  4. Step 4: Simplify right side
    20,645.12x = 319,493,624.83
  5. Step 5: Solve for x
    x = 319,493,624.83/20,645.12
  6. Step 6: Final answer
    x = 15,475.50

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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.