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Finding the Fourth Proportional to 28,642.99, 42,981.50 and 15,495.07

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Solution

The fourth proportional to 28,642.99, 42,981.50 and 15,495.07 is: 23,251.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,642.99 : 42,981.50 = 15,495.07 : x
  2. Step 2: Convert to fraction form
    28,642.99/42,981.50 = 15,495.07/x
  3. Step 3: Cross multiply
    28,642.99x = 42,981.50 × 15,495.07
  4. Step 4: Simplify right side
    28,642.99x = 666,001,273.73
  5. Step 5: Solve for x
    x = 666,001,273.73/28,642.99
  6. Step 6: Final answer
    x = 23,251.81

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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.