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Finding the Fourth Proportional to 15,645.99, 21,594.03 and 8,931.90

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Solution

The fourth proportional to 15,645.99, 21,594.03 and 8,931.90 is: 12,327.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,645.99 : 21,594.03 = 8,931.90 : x
  2. Step 2: Convert to fraction form
    15,645.99/21,594.03 = 8,931.90/x
  3. Step 3: Cross multiply
    15,645.99x = 21,594.03 × 8,931.90
  4. Step 4: Simplify right side
    15,645.99x = 192,875,716.56
  5. Step 5: Solve for x
    x = 192,875,716.56/15,645.99
  6. Step 6: Final answer
    x = 12,327.49

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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.