Home / 13,274.16-18,318.60-7,688.40

Finding the Fourth Proportional to 13,274.16, 18,318.60 and 7,688.40

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Solution

The fourth proportional to 13,274.16, 18,318.60 and 7,688.40 is: 10,610.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,274.16 : 18,318.60 = 7,688.40 : x
  2. Step 2: Convert to fraction form
    13,274.16/18,318.60 = 7,688.40/x
  3. Step 3: Cross multiply
    13,274.16x = 18,318.60 × 7,688.40
  4. Step 4: Simplify right side
    13,274.16x = 140,840,724.24
  5. Step 5: Solve for x
    x = 140,840,724.24/13,274.16
  6. Step 6: Final answer
    x = 10,610.14

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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.