Home / 20,612.51-28,445.14-11,180.87

Finding the Fourth Proportional to 20,612.51, 28,445.14 and 11,180.87

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Solution

The fourth proportional to 20,612.51, 28,445.14 and 11,180.87 is: 15,429.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.51 : 28,445.14 = 11,180.87 : x
  2. Step 2: Convert to fraction form
    20,612.51/28,445.14 = 11,180.87/x
  3. Step 3: Cross multiply
    20,612.51x = 28,445.14 × 11,180.87
  4. Step 4: Simplify right side
    20,612.51x = 318,041,412.47
  5. Step 5: Solve for x
    x = 318,041,412.47/20,612.51
  6. Step 6: Final answer
    x = 15,429.53

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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.