Home / 30,985.23-42,756.15-17,553.61

Finding the Fourth Proportional to 30,985.23, 42,756.15 and 17,553.61

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Solution

The fourth proportional to 30,985.23, 42,756.15 and 17,553.61 is: 24,222.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.23 : 42,756.15 = 17,553.61 : x
  2. Step 2: Convert to fraction form
    30,985.23/42,756.15 = 17,553.61/x
  3. Step 3: Cross multiply
    30,985.23x = 42,756.15 × 17,553.61
  4. Step 4: Simplify right side
    30,985.23x = 750,524,901.47
  5. Step 5: Solve for x
    x = 750,524,901.47/30,985.23
  6. Step 6: Final answer
    x = 24,222.02

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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.