Home / 30,981.15-42,754.14-18,234.81

Finding the Fourth Proportional to 30,981.15, 42,754.14 and 18,234.81

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Solution

The fourth proportional to 30,981.15, 42,754.14 and 18,234.81 is: 25,164.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.15 : 42,754.14 = 18,234.81 : x
  2. Step 2: Convert to fraction form
    30,981.15/42,754.14 = 18,234.81/x
  3. Step 3: Cross multiply
    30,981.15x = 42,754.14 × 18,234.81
  4. Step 4: Simplify right side
    30,981.15x = 779,613,619.61
  5. Step 5: Solve for x
    x = 779,613,619.61/30,981.15
  6. Step 6: Final answer
    x = 25,164.13

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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.