Home / 15,118.32-20,859.88-9,148.72

Finding the Fourth Proportional to 15,118.32, 20,859.88 and 9,148.72

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Solution

The fourth proportional to 15,118.32, 20,859.88 and 9,148.72 is: 12,623.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.32 : 20,859.88 = 9,148.72 : x
  2. Step 2: Convert to fraction form
    15,118.32/20,859.88 = 9,148.72/x
  3. Step 3: Cross multiply
    15,118.32x = 20,859.88 × 9,148.72
  4. Step 4: Simplify right side
    15,118.32x = 190,841,241.27
  5. Step 5: Solve for x
    x = 190,841,241.27/15,118.32
  6. Step 6: Final answer
    x = 12,623.18

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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.