Home / 20,488.40-28,275.05-12,528.13

Finding the Fourth Proportional to 20,488.40, 28,275.05 and 12,528.13

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Solution

The fourth proportional to 20,488.40, 28,275.05 and 12,528.13 is: 17,289.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.40 : 28,275.05 = 12,528.13 : x
  2. Step 2: Convert to fraction form
    20,488.40/28,275.05 = 12,528.13/x
  3. Step 3: Cross multiply
    20,488.40x = 28,275.05 × 12,528.13
  4. Step 4: Simplify right side
    20,488.40x = 354,233,439.52
  5. Step 5: Solve for x
    x = 354,233,439.52/20,488.40
  6. Step 6: Final answer
    x = 17,289.46

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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.