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Finding the Fourth Proportional to 28,941, 39,920.70 and 19,862.22

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Solution

The fourth proportional to 28,941, 39,920.70 and 19,862.22 is: 27,397.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,941 : 39,920.70 = 19,862.22 : x
  2. Step 2: Convert to fraction form
    28,941/39,920.70 = 19,862.22/x
  3. Step 3: Cross multiply
    28,941x = 39,920.70 × 19,862.22
  4. Step 4: Simplify right side
    28,941x = 792,913,725.95
  5. Step 5: Solve for x
    x = 792,913,725.95/28,941
  6. Step 6: Final answer
    x = 27,397.59

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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.