Home / 20,730.30-28,607.78-11,298.89

Finding the Fourth Proportional to 20,730.30, 28,607.78 and 11,298.89

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Solution

The fourth proportional to 20,730.30, 28,607.78 and 11,298.89 is: 15,592.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.30 : 28,607.78 = 11,298.89 : x
  2. Step 2: Convert to fraction form
    20,730.30/28,607.78 = 11,298.89/x
  3. Step 3: Cross multiply
    20,730.30x = 28,607.78 × 11,298.89
  4. Step 4: Simplify right side
    20,730.30x = 323,235,959.83
  5. Step 5: Solve for x
    x = 323,235,959.83/20,730.30
  6. Step 6: Final answer
    x = 15,592.44

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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.