Home / 10,075.20-15,112.80-6,381.60

Finding the Fourth Proportional to 10,075.20, 15,112.80 and 6,381.60

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Solution

The fourth proportional to 10,075.20, 15,112.80 and 6,381.60 is: 9,572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,075.20 : 15,112.80 = 6,381.60 : x
  2. Step 2: Convert to fraction form
    10,075.20/15,112.80 = 6,381.60/x
  3. Step 3: Cross multiply
    10,075.20x = 15,112.80 × 6,381.60
  4. Step 4: Simplify right side
    10,075.20x = 96,443,844.48
  5. Step 5: Solve for x
    x = 96,443,844.48/10,075.20
  6. Step 6: Final answer
    x = 9,572.40

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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.