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Finding the Fourth Proportional to 28,487.99, 42,727.05 and 7,706.63

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Solution

The fourth proportional to 28,487.99, 42,727.05 and 7,706.63 is: 11,558.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.99 : 42,727.05 = 7,706.63 : x
  2. Step 2: Convert to fraction form
    28,487.99/42,727.05 = 7,706.63/x
  3. Step 3: Cross multiply
    28,487.99x = 42,727.05 × 7,706.63
  4. Step 4: Simplify right side
    28,487.99x = 329,281,351.71
  5. Step 5: Solve for x
    x = 329,281,351.71/28,487.99
  6. Step 6: Final answer
    x = 11,558.60

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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.