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Finding the Fourth Proportional to 18,547.80, 27,797.40 and 7,445.40

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Solution

The fourth proportional to 18,547.80, 27,797.40 and 7,445.40 is: 11,158.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,547.80 : 27,797.40 = 7,445.40 : x
  2. Step 2: Convert to fraction form
    18,547.80/27,797.40 = 7,445.40/x
  3. Step 3: Cross multiply
    18,547.80x = 27,797.40 × 7,445.40
  4. Step 4: Simplify right side
    18,547.80x = 206,962,761.96
  5. Step 5: Solve for x
    x = 206,962,761.96/18,547.80
  6. Step 6: Final answer
    x = 11,158.35

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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.