Home / 12,945.15-17,845.29-9,156.65

Finding the Fourth Proportional to 12,945.15, 17,845.29 and 9,156.65

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Solution

The fourth proportional to 12,945.15, 17,845.29 and 9,156.65 is: 12,622.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.15 : 17,845.29 = 9,156.65 : x
  2. Step 2: Convert to fraction form
    12,945.15/17,845.29 = 9,156.65/x
  3. Step 3: Cross multiply
    12,945.15x = 17,845.29 × 9,156.65
  4. Step 4: Simplify right side
    12,945.15x = 163,402,985.45
  5. Step 5: Solve for x
    x = 163,402,985.45/12,945.15
  6. Step 6: Final answer
    x = 12,622.72

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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.