Home / 15,531.37-21,430.37-9,159.97

Finding the Fourth Proportional to 15,531.37, 21,430.37 and 9,159.97

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Solution

The fourth proportional to 15,531.37, 21,430.37 and 9,159.97 is: 12,639.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.37 : 21,430.37 = 9,159.97 : x
  2. Step 2: Convert to fraction form
    15,531.37/21,430.37 = 9,159.97/x
  3. Step 3: Cross multiply
    15,531.37x = 21,430.37 × 9,159.97
  4. Step 4: Simplify right side
    15,531.37x = 196,301,546.29
  5. Step 5: Solve for x
    x = 196,301,546.29/15,531.37
  6. Step 6: Final answer
    x = 12,639.04

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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.