Home / 15,433.40-21,298.01-8,721.20

Finding the Fourth Proportional to 15,433.40, 21,298.01 and 8,721.20

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Solution

The fourth proportional to 15,433.40, 21,298.01 and 8,721.20 is: 12,035.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,433.40 : 21,298.01 = 8,721.20 : x
  2. Step 2: Convert to fraction form
    15,433.40/21,298.01 = 8,721.20/x
  3. Step 3: Cross multiply
    15,433.40x = 21,298.01 × 8,721.20
  4. Step 4: Simplify right side
    15,433.40x = 185,744,214.45
  5. Step 5: Solve for x
    x = 185,744,214.45/15,433.40
  6. Step 6: Final answer
    x = 12,035.21

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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.