Home / 20,890.47-31,335.19-5,095.61

Finding the Fourth Proportional to 20,890.47, 31,335.19 and 5,095.61

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Solution

The fourth proportional to 20,890.47, 31,335.19 and 5,095.61 is: 7,643.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.47 : 31,335.19 = 5,095.61 : x
  2. Step 2: Convert to fraction form
    20,890.47/31,335.19 = 5,095.61/x
  3. Step 3: Cross multiply
    20,890.47x = 31,335.19 × 5,095.61
  4. Step 4: Simplify right side
    20,890.47x = 159,671,855.61
  5. Step 5: Solve for x
    x = 159,671,855.61/20,890.47
  6. Step 6: Final answer
    x = 7,643.29

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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.