Home / 15,403.71-21,260.61-12,881.44

Finding the Fourth Proportional to 15,403.71, 21,260.61 and 12,881.44

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Solution

The fourth proportional to 15,403.71, 21,260.61 and 12,881.44 is: 17,779.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.71 : 21,260.61 = 12,881.44 : x
  2. Step 2: Convert to fraction form
    15,403.71/21,260.61 = 12,881.44/x
  3. Step 3: Cross multiply
    15,403.71x = 21,260.61 × 12,881.44
  4. Step 4: Simplify right side
    15,403.71x = 273,867,272.08
  5. Step 5: Solve for x
    x = 273,867,272.08/15,403.71
  6. Step 6: Final answer
    x = 17,779.31

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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.