Home / 20,972.93-28,929.45-13,803.21

Finding the Fourth Proportional to 20,972.93, 28,929.45 and 13,803.21

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Solution

The fourth proportional to 20,972.93, 28,929.45 and 13,803.21 is: 19,039.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.93 : 28,929.45 = 13,803.21 : x
  2. Step 2: Convert to fraction form
    20,972.93/28,929.45 = 13,803.21/x
  3. Step 3: Cross multiply
    20,972.93x = 28,929.45 × 13,803.21
  4. Step 4: Simplify right side
    20,972.93x = 399,319,325.30
  5. Step 5: Solve for x
    x = 399,319,325.30/20,972.93
  6. Step 6: Final answer
    x = 19,039.75

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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.