Home / 20,938.61-28,895.40-11,378.58

Finding the Fourth Proportional to 20,938.61, 28,895.40 and 11,378.58

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Solution

The fourth proportional to 20,938.61, 28,895.40 and 11,378.58 is: 15,702.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.61 : 28,895.40 = 11,378.58 : x
  2. Step 2: Convert to fraction form
    20,938.61/28,895.40 = 11,378.58/x
  3. Step 3: Cross multiply
    20,938.61x = 28,895.40 × 11,378.58
  4. Step 4: Simplify right side
    20,938.61x = 328,788,512.17
  5. Step 5: Solve for x
    x = 328,788,512.17/20,938.61
  6. Step 6: Final answer
    x = 15,702.50

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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.