Home / 13,990.56-20,985.88-5,670.72

Finding the Fourth Proportional to 13,990.56, 20,985.88 and 5,670.72

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Solution

The fourth proportional to 13,990.56, 20,985.88 and 5,670.72 is: 8,506.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.56 : 20,985.88 = 5,670.72 : x
  2. Step 2: Convert to fraction form
    13,990.56/20,985.88 = 5,670.72/x
  3. Step 3: Cross multiply
    13,990.56x = 20,985.88 × 5,670.72
  4. Step 4: Simplify right side
    13,990.56x = 119,005,049.43
  5. Step 5: Solve for x
    x = 119,005,049.43/13,990.56
  6. Step 6: Final answer
    x = 8,506.10

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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.