Home / 15,129.06-20,854.98-10,640.58

Finding the Fourth Proportional to 15,129.06, 20,854.98 and 10,640.58

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Solution

The fourth proportional to 15,129.06, 20,854.98 and 10,640.58 is: 14,667.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.06 : 20,854.98 = 10,640.58 : x
  2. Step 2: Convert to fraction form
    15,129.06/20,854.98 = 10,640.58/x
  3. Step 3: Cross multiply
    15,129.06x = 20,854.98 × 10,640.58
  4. Step 4: Simplify right side
    15,129.06x = 221,909,083.09
  5. Step 5: Solve for x
    x = 221,909,083.09/15,129.06
  6. Step 6: Final answer
    x = 14,667.74

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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.