Home / 20,981.80-31,472.70-20,070.69

Finding the Fourth Proportional to 20,981.80, 31,472.70 and 20,070.69

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Solution

The fourth proportional to 20,981.80, 31,472.70 and 20,070.69 is: 30,106.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.80 : 31,472.70 = 20,070.69 : x
  2. Step 2: Convert to fraction form
    20,981.80/31,472.70 = 20,070.69/x
  3. Step 3: Cross multiply
    20,981.80x = 31,472.70 × 20,070.69
  4. Step 4: Simplify right side
    20,981.80x = 631,678,805.16
  5. Step 5: Solve for x
    x = 631,678,805.16/20,981.80
  6. Step 6: Final answer
    x = 30,106.04

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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.