Home / 10,088.40-15,112.80-6,615.12

Finding the Fourth Proportional to 10,088.40, 15,112.80 and 6,615.12

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Solution

The fourth proportional to 10,088.40, 15,112.80 and 6,615.12 is: 9,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,088.40 : 15,112.80 = 6,615.12 : x
  2. Step 2: Convert to fraction form
    10,088.40/15,112.80 = 6,615.12/x
  3. Step 3: Cross multiply
    10,088.40x = 15,112.80 × 6,615.12
  4. Step 4: Simplify right side
    10,088.40x = 99,972,985.54
  5. Step 5: Solve for x
    x = 99,972,985.54/10,088.40
  6. Step 6: Final answer
    x = 9,909.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.