Home / 28,006.65-42,003.90-17,981.28

Finding the Fourth Proportional to 28,006.65, 42,003.90 and 17,981.28

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Solution

The fourth proportional to 28,006.65, 42,003.90 and 17,981.28 is: 26,968.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.65 : 42,003.90 = 17,981.28 : x
  2. Step 2: Convert to fraction form
    28,006.65/42,003.90 = 17,981.28/x
  3. Step 3: Cross multiply
    28,006.65x = 42,003.90 × 17,981.28
  4. Step 4: Simplify right side
    28,006.65x = 755,283,886.99
  5. Step 5: Solve for x
    x = 755,283,886.99/28,006.65
  6. Step 6: Final answer
    x = 26,968.02

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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.