Home / 20,972.76-28,943.36-13,017.57

Finding the Fourth Proportional to 20,972.76, 28,943.36 and 13,017.57

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Solution

The fourth proportional to 20,972.76, 28,943.36 and 13,017.57 is: 17,964.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.76 : 28,943.36 = 13,017.57 : x
  2. Step 2: Convert to fraction form
    20,972.76/28,943.36 = 13,017.57/x
  3. Step 3: Cross multiply
    20,972.76x = 28,943.36 × 13,017.57
  4. Step 4: Simplify right side
    20,972.76x = 376,772,214.84
  5. Step 5: Solve for x
    x = 376,772,214.84/20,972.76
  6. Step 6: Final answer
    x = 17,964.84

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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.