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Finding the Fourth Proportional to 15,281.84, 20,930.89 and 14,385.20

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Solution

The fourth proportional to 15,281.84, 20,930.89 and 14,385.20 is: 19,702.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,281.84 : 20,930.89 = 14,385.20 : x
  2. Step 2: Convert to fraction form
    15,281.84/20,930.89 = 14,385.20/x
  3. Step 3: Cross multiply
    15,281.84x = 20,930.89 × 14,385.20
  4. Step 4: Simplify right side
    15,281.84x = 301,095,038.83
  5. Step 5: Solve for x
    x = 301,095,038.83/15,281.84
  6. Step 6: Final answer
    x = 19,702.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.