Home / 11,465.31-15,815.40-7,209.63

Finding the Fourth Proportional to 11,465.31, 15,815.40 and 7,209.63

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Solution

The fourth proportional to 11,465.31, 15,815.40 and 7,209.63 is: 9,945.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,465.31 : 15,815.40 = 7,209.63 : x
  2. Step 2: Convert to fraction form
    11,465.31/15,815.40 = 7,209.63/x
  3. Step 3: Cross multiply
    11,465.31x = 15,815.40 × 7,209.63
  4. Step 4: Simplify right side
    11,465.31x = 114,023,182.30
  5. Step 5: Solve for x
    x = 114,023,182.30/11,465.31
  6. Step 6: Final answer
    x = 9,945.06

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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.