Home / 15,434.79-21,298.74-8,721

Finding the Fourth Proportional to 15,434.79, 21,298.74 and 8,721

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Solution

The fourth proportional to 15,434.79, 21,298.74 and 8,721 is: 12,034.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.79 : 21,298.74 = 8,721 : x
  2. Step 2: Convert to fraction form
    15,434.79/21,298.74 = 8,721/x
  3. Step 3: Cross multiply
    15,434.79x = 21,298.74 × 8,721
  4. Step 4: Simplify right side
    15,434.79x = 185,746,311.54
  5. Step 5: Solve for x
    x = 185,746,311.54/15,434.79
  6. Step 6: Final answer
    x = 12,034.26

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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.