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Finding the Fourth Proportional to 28,510, 39,345.02 and 15,934.75

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Solution

The fourth proportional to 28,510, 39,345.02 and 15,934.75 is: 21,990.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510 : 39,345.02 = 15,934.75 : x
  2. Step 2: Convert to fraction form
    28,510/39,345.02 = 15,934.75/x
  3. Step 3: Cross multiply
    28,510x = 39,345.02 × 15,934.75
  4. Step 4: Simplify right side
    28,510x = 626,953,057.45
  5. Step 5: Solve for x
    x = 626,953,057.45/28,510
  6. Step 6: Final answer
    x = 21,990.64

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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.