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Finding the Fourth Proportional to 13,597.88, 18,765.70 and 7,931.72

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Solution

The fourth proportional to 13,597.88, 18,765.70 and 7,931.72 is: 10,946.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,597.88 : 18,765.70 = 7,931.72 : x
  2. Step 2: Convert to fraction form
    13,597.88/18,765.70 = 7,931.72/x
  3. Step 3: Cross multiply
    13,597.88x = 18,765.70 × 7,931.72
  4. Step 4: Simplify right side
    13,597.88x = 148,844,305.09
  5. Step 5: Solve for x
    x = 148,844,305.09/13,597.88
  6. Step 6: Final answer
    x = 10,946.14

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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.