Home / 15,117.90-20,862.96-8,403.60

Finding the Fourth Proportional to 15,117.90, 20,862.96 and 8,403.60

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Solution

The fourth proportional to 15,117.90, 20,862.96 and 8,403.60 is: 11,597.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.90 : 20,862.96 = 8,403.60 : x
  2. Step 2: Convert to fraction form
    15,117.90/20,862.96 = 8,403.60/x
  3. Step 3: Cross multiply
    15,117.90x = 20,862.96 × 8,403.60
  4. Step 4: Simplify right side
    15,117.90x = 175,323,970.66
  5. Step 5: Solve for x
    x = 175,323,970.66/15,117.90
  6. Step 6: Final answer
    x = 11,597.11

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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.