Home / 20,488.90-28,275.74-12,528.63

Finding the Fourth Proportional to 20,488.90, 28,275.74 and 12,528.63

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Solution

The fourth proportional to 20,488.90, 28,275.74 and 12,528.63 is: 17,290.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.90 : 28,275.74 = 12,528.63 : x
  2. Step 2: Convert to fraction form
    20,488.90/28,275.74 = 12,528.63/x
  3. Step 3: Cross multiply
    20,488.90x = 28,275.74 × 12,528.63
  4. Step 4: Simplify right side
    20,488.90x = 354,256,221.79
  5. Step 5: Solve for x
    x = 354,256,221.79/20,488.90
  6. Step 6: Final answer
    x = 17,290.15

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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.