Home / 15,507.36-21,400.20-8,433.78

Finding the Fourth Proportional to 15,507.36, 21,400.20 and 8,433.78

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Solution

The fourth proportional to 15,507.36, 21,400.20 and 8,433.78 is: 11,638.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,507.36 : 21,400.20 = 8,433.78 : x
  2. Step 2: Convert to fraction form
    15,507.36/21,400.20 = 8,433.78/x
  3. Step 3: Cross multiply
    15,507.36x = 21,400.20 × 8,433.78
  4. Step 4: Simplify right side
    15,507.36x = 180,484,578.76
  5. Step 5: Solve for x
    x = 180,484,578.76/15,507.36
  6. Step 6: Final answer
    x = 11,638.64

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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.