Home / 20,810.12-31,215.18-9,125.96

Finding the Fourth Proportional to 20,810.12, 31,215.18 and 9,125.96

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Solution

The fourth proportional to 20,810.12, 31,215.18 and 9,125.96 is: 13,688.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.12 : 31,215.18 = 9,125.96 : x
  2. Step 2: Convert to fraction form
    20,810.12/31,215.18 = 9,125.96/x
  3. Step 3: Cross multiply
    20,810.12x = 31,215.18 × 9,125.96
  4. Step 4: Simplify right side
    20,810.12x = 284,868,484.07
  5. Step 5: Solve for x
    x = 284,868,484.07/20,810.12
  6. Step 6: Final answer
    x = 13,688.94

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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.