Home / 20,312.67-27,969.17-17,780.61

Finding the Fourth Proportional to 20,312.67, 27,969.17 and 17,780.61

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Solution

The fourth proportional to 20,312.67, 27,969.17 and 17,780.61 is: 24,482.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.67 : 27,969.17 = 17,780.61 : x
  2. Step 2: Convert to fraction form
    20,312.67/27,969.17 = 17,780.61/x
  3. Step 3: Cross multiply
    20,312.67x = 27,969.17 × 17,780.61
  4. Step 4: Simplify right side
    20,312.67x = 497,308,903.79
  5. Step 5: Solve for x
    x = 497,308,903.79/20,312.67
  6. Step 6: Final answer
    x = 24,482.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.