Home / 20,730.40-31,099.65-8,248.30

Finding the Fourth Proportional to 20,730.40, 31,099.65 and 8,248.30

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Solution

The fourth proportional to 20,730.40, 31,099.65 and 8,248.30 is: 12,374.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.40 : 31,099.65 = 8,248.30 : x
  2. Step 2: Convert to fraction form
    20,730.40/31,099.65 = 8,248.30/x
  3. Step 3: Cross multiply
    20,730.40x = 31,099.65 × 8,248.30
  4. Step 4: Simplify right side
    20,730.40x = 256,519,243.10
  5. Step 5: Solve for x
    x = 256,519,243.10/20,730.40
  6. Step 6: Final answer
    x = 12,374.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.