Home / 15,117.68-20,862.36-8,403.28

Finding the Fourth Proportional to 15,117.68, 20,862.36 and 8,403.28

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Solution

The fourth proportional to 15,117.68, 20,862.36 and 8,403.28 is: 11,596.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.68 : 20,862.36 = 8,403.28 : x
  2. Step 2: Convert to fraction form
    15,117.68/20,862.36 = 8,403.28/x
  3. Step 3: Cross multiply
    15,117.68x = 20,862.36 × 8,403.28
  4. Step 4: Simplify right side
    15,117.68x = 175,312,252.54
  5. Step 5: Solve for x
    x = 175,312,252.54/15,117.68
  6. Step 6: Final answer
    x = 11,596.51

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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.