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Finding the Fourth Proportional to 18,547.18, 27,821.01 and 5,220.31

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Solution

The fourth proportional to 18,547.18, 27,821.01 and 5,220.31 is: 7,830.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,547.18 : 27,821.01 = 5,220.31 : x
  2. Step 2: Convert to fraction form
    18,547.18/27,821.01 = 5,220.31/x
  3. Step 3: Cross multiply
    18,547.18x = 27,821.01 × 5,220.31
  4. Step 4: Simplify right side
    18,547.18x = 145,234,296.71
  5. Step 5: Solve for x
    x = 145,234,296.71/18,547.18
  6. Step 6: Final answer
    x = 7,830.53

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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.