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Finding the Fourth Proportional to 7,980.31, 12,030.19 and 7,445.08

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Solution

The fourth proportional to 7,980.31, 12,030.19 and 7,445.08 is: 11,223.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.31 : 12,030.19 = 7,445.08 : x
  2. Step 2: Convert to fraction form
    7,980.31/12,030.19 = 7,445.08/x
  3. Step 3: Cross multiply
    7,980.31x = 12,030.19 × 7,445.08
  4. Step 4: Simplify right side
    7,980.31x = 89,565,726.97
  5. Step 5: Solve for x
    x = 89,565,726.97/7,980.31
  6. Step 6: Final answer
    x = 11,223.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.