Home / 20,985.74-31,478.61-14,391.93

Finding the Fourth Proportional to 20,985.74, 31,478.61 and 14,391.93

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Solution

The fourth proportional to 20,985.74, 31,478.61 and 14,391.93 is: 21,587.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.74 : 31,478.61 = 14,391.93 : x
  2. Step 2: Convert to fraction form
    20,985.74/31,478.61 = 14,391.93/x
  3. Step 3: Cross multiply
    20,985.74x = 31,478.61 × 14,391.93
  4. Step 4: Simplify right side
    20,985.74x = 453,038,042.68
  5. Step 5: Solve for x
    x = 453,038,042.68/20,985.74
  6. Step 6: Final answer
    x = 21,587.90

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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.