Home / 21,013.83-28,989.90-15,043.32

Finding the Fourth Proportional to 21,013.83, 28,989.90 and 15,043.32

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Solution

The fourth proportional to 21,013.83, 28,989.90 and 15,043.32 is: 20,753.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.83 : 28,989.90 = 15,043.32 : x
  2. Step 2: Convert to fraction form
    21,013.83/28,989.90 = 15,043.32/x
  3. Step 3: Cross multiply
    21,013.83x = 28,989.90 × 15,043.32
  4. Step 4: Simplify right side
    21,013.83x = 436,104,342.47
  5. Step 5: Solve for x
    x = 436,104,342.47/21,013.83
  6. Step 6: Final answer
    x = 20,753.21

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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.