Home / 30,699.27-42,342.28-21,142.22

Finding the Fourth Proportional to 30,699.27, 42,342.28 and 21,142.22

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Solution

The fourth proportional to 30,699.27, 42,342.28 and 21,142.22 is: 29,160.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,699.27 : 42,342.28 = 21,142.22 : x
  2. Step 2: Convert to fraction form
    30,699.27/42,342.28 = 21,142.22/x
  3. Step 3: Cross multiply
    30,699.27x = 42,342.28 × 21,142.22
  4. Step 4: Simplify right side
    30,699.27x = 895,209,534.49
  5. Step 5: Solve for x
    x = 895,209,534.49/30,699.27
  6. Step 6: Final answer
    x = 29,160.61

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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.