Home / 28,773.42-39,718.11-21,280.05

Finding the Fourth Proportional to 28,773.42, 39,718.11 and 21,280.05

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Solution

The fourth proportional to 28,773.42, 39,718.11 and 21,280.05 is: 29,374.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,773.42 : 39,718.11 = 21,280.05 : x
  2. Step 2: Convert to fraction form
    28,773.42/39,718.11 = 21,280.05/x
  3. Step 3: Cross multiply
    28,773.42x = 39,718.11 × 21,280.05
  4. Step 4: Simplify right side
    28,773.42x = 845,203,366.71
  5. Step 5: Solve for x
    x = 845,203,366.71/28,773.42
  6. Step 6: Final answer
    x = 29,374.45

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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.