Home / 15,543.89-21,450.57-8,470.31

Finding the Fourth Proportional to 15,543.89, 21,450.57 and 8,470.31

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Solution

The fourth proportional to 15,543.89, 21,450.57 and 8,470.31 is: 11,689.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.89 : 21,450.57 = 8,470.31 : x
  2. Step 2: Convert to fraction form
    15,543.89/21,450.57 = 8,470.31/x
  3. Step 3: Cross multiply
    15,543.89x = 21,450.57 × 8,470.31
  4. Step 4: Simplify right side
    15,543.89x = 181,693,047.08
  5. Step 5: Solve for x
    x = 181,693,047.08/15,543.89
  6. Step 6: Final answer
    x = 11,689.03

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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.