Home / 7,478.80-11,219.72-2,547.12

Finding the Fourth Proportional to 7,478.80, 11,219.72 and 2,547.12

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Solution

The fourth proportional to 7,478.80, 11,219.72 and 2,547.12 is: 3,821.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.80 : 11,219.72 = 2,547.12 : x
  2. Step 2: Convert to fraction form
    7,478.80/11,219.72 = 2,547.12/x
  3. Step 3: Cross multiply
    7,478.80x = 11,219.72 × 2,547.12
  4. Step 4: Simplify right side
    7,478.80x = 28,577,973.21
  5. Step 5: Solve for x
    x = 28,577,973.21/7,478.80
  6. Step 6: Final answer
    x = 3,821.20

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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.