Home / 15,489.10-21,376.80-9,201.49

Finding the Fourth Proportional to 15,489.10, 21,376.80 and 9,201.49

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Solution

The fourth proportional to 15,489.10, 21,376.80 and 9,201.49 is: 12,699.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.10 : 21,376.80 = 9,201.49 : x
  2. Step 2: Convert to fraction form
    15,489.10/21,376.80 = 9,201.49/x
  3. Step 3: Cross multiply
    15,489.10x = 21,376.80 × 9,201.49
  4. Step 4: Simplify right side
    15,489.10x = 196,698,411.43
  5. Step 5: Solve for x
    x = 196,698,411.43/15,489.10
  6. Step 6: Final answer
    x = 12,699.15

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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.