Home / 28,543.91-39,428.24-21,911.49

Finding the Fourth Proportional to 28,543.91, 39,428.24 and 21,911.49

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Solution

The fourth proportional to 28,543.91, 39,428.24 and 21,911.49 is: 30,266.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,543.91 : 39,428.24 = 21,911.49 : x
  2. Step 2: Convert to fraction form
    28,543.91/39,428.24 = 21,911.49/x
  3. Step 3: Cross multiply
    28,543.91x = 39,428.24 × 21,911.49
  4. Step 4: Simplify right side
    28,543.91x = 863,931,639.83
  5. Step 5: Solve for x
    x = 863,931,639.83/28,543.91
  6. Step 6: Final answer
    x = 30,266.76

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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.