Home / 13,156.12-18,157.50-8,445.40

Finding the Fourth Proportional to 13,156.12, 18,157.50 and 8,445.40

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Solution

The fourth proportional to 13,156.12, 18,157.50 and 8,445.40 is: 11,655.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.12 : 18,157.50 = 8,445.40 : x
  2. Step 2: Convert to fraction form
    13,156.12/18,157.50 = 8,445.40/x
  3. Step 3: Cross multiply
    13,156.12x = 18,157.50 × 8,445.40
  4. Step 4: Simplify right side
    13,156.12x = 153,347,350.50
  5. Step 5: Solve for x
    x = 153,347,350.50/13,156.12
  6. Step 6: Final answer
    x = 11,655.97

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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.