Home / 11,220.30-15,478.29-7,686.90

Finding the Fourth Proportional to 11,220.30, 15,478.29 and 7,686.90

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Solution

The fourth proportional to 11,220.30, 15,478.29 and 7,686.90 is: 10,604.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.30 : 15,478.29 = 7,686.90 : x
  2. Step 2: Convert to fraction form
    11,220.30/15,478.29 = 7,686.90/x
  3. Step 3: Cross multiply
    11,220.30x = 15,478.29 × 7,686.90
  4. Step 4: Simplify right side
    11,220.30x = 118,980,067.40
  5. Step 5: Solve for x
    x = 118,980,067.40/11,220.30
  6. Step 6: Final answer
    x = 10,604.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.