Home / 15,434.67-21,300.27-8,720.58

Finding the Fourth Proportional to 15,434.67, 21,300.27 and 8,720.58

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Solution

The fourth proportional to 15,434.67, 21,300.27 and 8,720.58 is: 12,034.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.67 : 21,300.27 = 8,720.58 : x
  2. Step 2: Convert to fraction form
    15,434.67/21,300.27 = 8,720.58/x
  3. Step 3: Cross multiply
    15,434.67x = 21,300.27 × 8,720.58
  4. Step 4: Simplify right side
    15,434.67x = 185,750,708.56
  5. Step 5: Solve for x
    x = 185,750,708.56/15,434.67
  6. Step 6: Final answer
    x = 12,034.64

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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.