Home / 15,155.36-20,915.34-10,116.36

Finding the Fourth Proportional to 15,155.36, 20,915.34 and 10,116.36

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Solution

The fourth proportional to 15,155.36, 20,915.34 and 10,116.36 is: 13,961.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.36 : 20,915.34 = 10,116.36 : x
  2. Step 2: Convert to fraction form
    15,155.36/20,915.34 = 10,116.36/x
  3. Step 3: Cross multiply
    15,155.36x = 20,915.34 × 10,116.36
  4. Step 4: Simplify right side
    15,155.36x = 211,587,108.96
  5. Step 5: Solve for x
    x = 211,587,108.96/15,155.36
  6. Step 6: Final answer
    x = 13,961.21

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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.