Home / 28,023.57-38,665.80-15,921.39

Finding the Fourth Proportional to 28,023.57, 38,665.80 and 15,921.39

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Solution

The fourth proportional to 28,023.57, 38,665.80 and 15,921.39 is: 21,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,023.57 : 38,665.80 = 15,921.39 : x
  2. Step 2: Convert to fraction form
    28,023.57/38,665.80 = 15,921.39/x
  3. Step 3: Cross multiply
    28,023.57x = 38,665.80 × 15,921.39
  4. Step 4: Simplify right side
    28,023.57x = 615,613,281.46
  5. Step 5: Solve for x
    x = 615,613,281.46/28,023.57
  6. Step 6: Final answer
    x = 21,967.70

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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.