Home / 10,243.20-15,364.80-10,178.40

Finding the Fourth Proportional to 10,243.20, 15,364.80 and 10,178.40

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Solution

The fourth proportional to 10,243.20, 15,364.80 and 10,178.40 is: 15,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,243.20 : 15,364.80 = 10,178.40 : x
  2. Step 2: Convert to fraction form
    10,243.20/15,364.80 = 10,178.40/x
  3. Step 3: Cross multiply
    10,243.20x = 15,364.80 × 10,178.40
  4. Step 4: Simplify right side
    10,243.20x = 156,389,080.32
  5. Step 5: Solve for x
    x = 156,389,080.32/10,243.20
  6. Step 6: Final answer
    x = 15,267.60

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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.