Home / 20,730.42-28,607.76-11,298.78

Finding the Fourth Proportional to 20,730.42, 28,607.76 and 11,298.78

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Solution

The fourth proportional to 20,730.42, 28,607.76 and 11,298.78 is: 15,592.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.42 : 28,607.76 = 11,298.78 : x
  2. Step 2: Convert to fraction form
    20,730.42/28,607.76 = 11,298.78/x
  3. Step 3: Cross multiply
    20,730.42x = 28,607.76 × 11,298.78
  4. Step 4: Simplify right side
    20,730.42x = 323,232,786.53
  5. Step 5: Solve for x
    x = 323,232,786.53/20,730.42
  6. Step 6: Final answer
    x = 15,592.20

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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.