Home / 10,515.80-15,765.70-5,325.40

Finding the Fourth Proportional to 10,515.80, 15,765.70 and 5,325.40

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Solution

The fourth proportional to 10,515.80, 15,765.70 and 5,325.40 is: 7,984.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.80 : 15,765.70 = 5,325.40 : x
  2. Step 2: Convert to fraction form
    10,515.80/15,765.70 = 5,325.40/x
  3. Step 3: Cross multiply
    10,515.80x = 15,765.70 × 5,325.40
  4. Step 4: Simplify right side
    10,515.80x = 83,958,658.78
  5. Step 5: Solve for x
    x = 83,958,658.78/10,515.80
  6. Step 6: Final answer
    x = 7,984.05

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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.