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Finding the Fourth Proportional to 20,547.80, 30,821.70 and 14,910.20

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Solution

The fourth proportional to 20,547.80, 30,821.70 and 14,910.20 is: 22,365.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.80 : 30,821.70 = 14,910.20 : x
  2. Step 2: Convert to fraction form
    20,547.80/30,821.70 = 14,910.20/x
  3. Step 3: Cross multiply
    20,547.80x = 30,821.70 × 14,910.20
  4. Step 4: Simplify right side
    20,547.80x = 459,557,711.34
  5. Step 5: Solve for x
    x = 459,557,711.34/20,547.80
  6. Step 6: Final answer
    x = 22,365.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.