Home / 30,643.17-42,250.78-22,131.69

Finding the Fourth Proportional to 30,643.17, 42,250.78 and 22,131.69

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Solution

The fourth proportional to 30,643.17, 42,250.78 and 22,131.69 is: 30,515.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,643.17 : 42,250.78 = 22,131.69 : x
  2. Step 2: Convert to fraction form
    30,643.17/42,250.78 = 22,131.69/x
  3. Step 3: Cross multiply
    30,643.17x = 42,250.78 × 22,131.69
  4. Step 4: Simplify right side
    30,643.17x = 935,081,165.22
  5. Step 5: Solve for x
    x = 935,081,165.22/30,643.17
  6. Step 6: Final answer
    x = 30,515.16

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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.