Home / 20,976.04-31,465.68-8,490.16

Finding the Fourth Proportional to 20,976.04, 31,465.68 and 8,490.16

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Solution

The fourth proportional to 20,976.04, 31,465.68 and 8,490.16 is: 12,735.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.04 : 31,465.68 = 8,490.16 : x
  2. Step 2: Convert to fraction form
    20,976.04/31,465.68 = 8,490.16/x
  3. Step 3: Cross multiply
    20,976.04x = 31,465.68 × 8,490.16
  4. Step 4: Simplify right side
    20,976.04x = 267,148,657.71
  5. Step 5: Solve for x
    x = 267,148,657.71/20,976.04
  6. Step 6: Final answer
    x = 12,735.90

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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.