Home / 30,700.27-42,343.66-21,143.22

Finding the Fourth Proportional to 30,700.27, 42,343.66 and 21,143.22

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Solution

The fourth proportional to 30,700.27, 42,343.66 and 21,143.22 is: 29,162.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,700.27 : 42,343.66 = 21,143.22 : x
  2. Step 2: Convert to fraction form
    30,700.27/42,343.66 = 21,143.22/x
  3. Step 3: Cross multiply
    30,700.27x = 42,343.66 × 21,143.22
  4. Step 4: Simplify right side
    30,700.27x = 895,281,318.99
  5. Step 5: Solve for x
    x = 895,281,318.99/30,700.27
  6. Step 6: Final answer
    x = 29,162.00

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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.