Home / 15,140.79-20,894.10-8,426.25

Finding the Fourth Proportional to 15,140.79, 20,894.10 and 8,426.25

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Solution

The fourth proportional to 15,140.79, 20,894.10 and 8,426.25 is: 11,628.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.79 : 20,894.10 = 8,426.25 : x
  2. Step 2: Convert to fraction form
    15,140.79/20,894.10 = 8,426.25/x
  3. Step 3: Cross multiply
    15,140.79x = 20,894.10 × 8,426.25
  4. Step 4: Simplify right side
    15,140.79x = 176,058,910.13
  5. Step 5: Solve for x
    x = 176,058,910.13/15,140.79
  6. Step 6: Final answer
    x = 11,628.12

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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.