Home / 10,278.80-15,418.20-9,875.60

Finding the Fourth Proportional to 10,278.80, 15,418.20 and 9,875.60

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Solution

The fourth proportional to 10,278.80, 15,418.20 and 9,875.60 is: 14,813.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,278.80 : 15,418.20 = 9,875.60 : x
  2. Step 2: Convert to fraction form
    10,278.80/15,418.20 = 9,875.60/x
  3. Step 3: Cross multiply
    10,278.80x = 15,418.20 × 9,875.60
  4. Step 4: Simplify right side
    10,278.80x = 152,263,975.92
  5. Step 5: Solve for x
    x = 152,263,975.92/10,278.80
  6. Step 6: Final answer
    x = 14,813.40

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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.