Home / 20,861.13-31,275.28-10,323.75

Finding the Fourth Proportional to 20,861.13, 31,275.28 and 10,323.75

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Solution

The fourth proportional to 20,861.13, 31,275.28 and 10,323.75 is: 15,477.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.13 : 31,275.28 = 10,323.75 : x
  2. Step 2: Convert to fraction form
    20,861.13/31,275.28 = 10,323.75/x
  3. Step 3: Cross multiply
    20,861.13x = 31,275.28 × 10,323.75
  4. Step 4: Simplify right side
    20,861.13x = 322,878,171.90
  5. Step 5: Solve for x
    x = 322,878,171.90/20,861.13
  6. Step 6: Final answer
    x = 15,477.50

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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.