Home / 20,590.76-31,031.18-18,618.63

Finding the Fourth Proportional to 20,590.76, 31,031.18 and 18,618.63

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Solution

The fourth proportional to 20,590.76, 31,031.18 and 18,618.63 is: 28,059.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.76 : 31,031.18 = 18,618.63 : x
  2. Step 2: Convert to fraction form
    20,590.76/31,031.18 = 18,618.63/x
  3. Step 3: Cross multiply
    20,590.76x = 31,031.18 × 18,618.63
  4. Step 4: Simplify right side
    20,590.76x = 577,757,965.79
  5. Step 5: Solve for x
    x = 577,757,965.79/20,590.76
  6. Step 6: Final answer
    x = 28,059.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.