Home / 13,738.64-18,957.60-7,688.72

Finding the Fourth Proportional to 13,738.64, 18,957.60 and 7,688.72

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Solution

The fourth proportional to 13,738.64, 18,957.60 and 7,688.72 is: 10,609.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,738.64 : 18,957.60 = 7,688.72 : x
  2. Step 2: Convert to fraction form
    13,738.64/18,957.60 = 7,688.72/x
  3. Step 3: Cross multiply
    13,738.64x = 18,957.60 × 7,688.72
  4. Step 4: Simplify right side
    13,738.64x = 145,759,678.27
  5. Step 5: Solve for x
    x = 145,759,678.27/13,738.64
  6. Step 6: Final answer
    x = 10,609.47

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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.