Home / 13,240.40-18,271.88-7,272.20

Finding the Fourth Proportional to 13,240.40, 18,271.88 and 7,272.20

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Solution

The fourth proportional to 13,240.40, 18,271.88 and 7,272.20 is: 10,035.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.40 : 18,271.88 = 7,272.20 : x
  2. Step 2: Convert to fraction form
    13,240.40/18,271.88 = 7,272.20/x
  3. Step 3: Cross multiply
    13,240.40x = 18,271.88 × 7,272.20
  4. Step 4: Simplify right side
    13,240.40x = 132,876,638.02
  5. Step 5: Solve for x
    x = 132,876,638.02/13,240.40
  6. Step 6: Final answer
    x = 10,035.70

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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.