Home / 10,520.85-15,759.41-4,978.63

Finding the Fourth Proportional to 10,520.85, 15,759.41 and 4,978.63

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Solution

The fourth proportional to 10,520.85, 15,759.41 and 4,978.63 is: 7,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.85 : 15,759.41 = 4,978.63 : x
  2. Step 2: Convert to fraction form
    10,520.85/15,759.41 = 4,978.63/x
  3. Step 3: Cross multiply
    10,520.85x = 15,759.41 × 4,978.63
  4. Step 4: Simplify right side
    10,520.85x = 78,460,294.22
  5. Step 5: Solve for x
    x = 78,460,294.22/10,520.85
  6. Step 6: Final answer
    x = 7,457.60

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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.