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Finding the Fourth Proportional to 28,697, 39,600.78 and 15,950.96

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Solution

The fourth proportional to 28,697, 39,600.78 and 15,950.96 is: 22,011.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,697 : 39,600.78 = 15,950.96 : x
  2. Step 2: Convert to fraction form
    28,697/39,600.78 = 15,950.96/x
  3. Step 3: Cross multiply
    28,697x = 39,600.78 × 15,950.96
  4. Step 4: Simplify right side
    28,697x = 631,670,457.75
  5. Step 5: Solve for x
    x = 631,670,457.75/28,697
  6. Step 6: Final answer
    x = 22,011.72

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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.