Home / 15,435.27-21,300.51-8,720.91

Finding the Fourth Proportional to 15,435.27, 21,300.51 and 8,720.91

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Solution

The fourth proportional to 15,435.27, 21,300.51 and 8,720.91 is: 12,034.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.27 : 21,300.51 = 8,720.91 : x
  2. Step 2: Convert to fraction form
    15,435.27/21,300.51 = 8,720.91/x
  3. Step 3: Cross multiply
    15,435.27x = 21,300.51 × 8,720.91
  4. Step 4: Simplify right side
    15,435.27x = 185,759,830.66
  5. Step 5: Solve for x
    x = 185,759,830.66/15,435.27
  6. Step 6: Final answer
    x = 12,034.76

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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.