Home / 13,655.40-18,842.78-8,617.72

Finding the Fourth Proportional to 13,655.40, 18,842.78 and 8,617.72

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Solution

The fourth proportional to 13,655.40, 18,842.78 and 8,617.72 is: 11,891.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.40 : 18,842.78 = 8,617.72 : x
  2. Step 2: Convert to fraction form
    13,655.40/18,842.78 = 8,617.72/x
  3. Step 3: Cross multiply
    13,655.40x = 18,842.78 × 8,617.72
  4. Step 4: Simplify right side
    13,655.40x = 162,381,802.06
  5. Step 5: Solve for x
    x = 162,381,802.06/13,655.40
  6. Step 6: Final answer
    x = 11,891.40

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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.