Home / 13,659.08-18,845.76-7,690.40

Finding the Fourth Proportional to 13,659.08, 18,845.76 and 7,690.40

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Solution

The fourth proportional to 13,659.08, 18,845.76 and 7,690.40 is: 10,610.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.08 : 18,845.76 = 7,690.40 : x
  2. Step 2: Convert to fraction form
    13,659.08/18,845.76 = 7,690.40/x
  3. Step 3: Cross multiply
    13,659.08x = 18,845.76 × 7,690.40
  4. Step 4: Simplify right side
    13,659.08x = 144,931,432.70
  5. Step 5: Solve for x
    x = 144,931,432.70/13,659.08
  6. Step 6: Final answer
    x = 10,610.63

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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.