Home / 15,311.31-21,128.09-9,344.45

Finding the Fourth Proportional to 15,311.31, 21,128.09 and 9,344.45

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Solution

The fourth proportional to 15,311.31, 21,128.09 and 9,344.45 is: 12,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.31 : 21,128.09 = 9,344.45 : x
  2. Step 2: Convert to fraction form
    15,311.31/21,128.09 = 9,344.45/x
  3. Step 3: Cross multiply
    15,311.31x = 21,128.09 × 9,344.45
  4. Step 4: Simplify right side
    15,311.31x = 197,430,228.24
  5. Step 5: Solve for x
    x = 197,430,228.24/15,311.31
  6. Step 6: Final answer
    x = 12,894.40

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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.