Home / 10,420.80-15,609.60-6,899.52

Finding the Fourth Proportional to 10,420.80, 15,609.60 and 6,899.52

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Solution

The fourth proportional to 10,420.80, 15,609.60 and 6,899.52 is: 10,334.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.80 : 15,609.60 = 6,899.52 : x
  2. Step 2: Convert to fraction form
    10,420.80/15,609.60 = 6,899.52/x
  3. Step 3: Cross multiply
    10,420.80x = 15,609.60 × 6,899.52
  4. Step 4: Simplify right side
    10,420.80x = 107,698,747.39
  5. Step 5: Solve for x
    x = 107,698,747.39/10,420.80
  6. Step 6: Final answer
    x = 10,334.98

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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.