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Finding the Fourth Proportional to 43,307.66, 64,955.72 and 13,728.49

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Solution

The fourth proportional to 43,307.66, 64,955.72 and 13,728.49 is: 20,590.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,307.66 : 64,955.72 = 13,728.49 : x
  2. Step 2: Convert to fraction form
    43,307.66/64,955.72 = 13,728.49/x
  3. Step 3: Cross multiply
    43,307.66x = 64,955.72 × 13,728.49
  4. Step 4: Simplify right side
    43,307.66x = 891,743,824.39
  5. Step 5: Solve for x
    x = 891,743,824.39/43,307.66
  6. Step 6: Final answer
    x = 20,590.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.