Home / 8,985.72-12,400.35-5,211.13

Finding the Fourth Proportional to 8,985.72, 12,400.35 and 5,211.13

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Solution

The fourth proportional to 8,985.72, 12,400.35 and 5,211.13 is: 7,191.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.72 : 12,400.35 = 5,211.13 : x
  2. Step 2: Convert to fraction form
    8,985.72/12,400.35 = 5,211.13/x
  3. Step 3: Cross multiply
    8,985.72x = 12,400.35 × 5,211.13
  4. Step 4: Simplify right side
    8,985.72x = 64,619,800.01
  5. Step 5: Solve for x
    x = 64,619,800.01/8,985.72
  6. Step 6: Final answer
    x = 7,191.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.