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Finding the Fourth Proportional to 12,859.65, 17,749.79 and 7,557.99

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Solution

The fourth proportional to 12,859.65, 17,749.79 and 7,557.99 is: 10,432.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.65 : 17,749.79 = 7,557.99 : x
  2. Step 2: Convert to fraction form
    12,859.65/17,749.79 = 7,557.99/x
  3. Step 3: Cross multiply
    12,859.65x = 17,749.79 × 7,557.99
  4. Step 4: Simplify right side
    12,859.65x = 134,152,697.53
  5. Step 5: Solve for x
    x = 134,152,697.53/12,859.65
  6. Step 6: Final answer
    x = 10,432.06

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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.