Home / 15,543.72-21,450.84-8,470.32

Finding the Fourth Proportional to 15,543.72, 21,450.84 and 8,470.32

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Solution

The fourth proportional to 15,543.72, 21,450.84 and 8,470.32 is: 11,689.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.72 : 21,450.84 = 8,470.32 : x
  2. Step 2: Convert to fraction form
    15,543.72/21,450.84 = 8,470.32/x
  3. Step 3: Cross multiply
    15,543.72x = 21,450.84 × 8,470.32
  4. Step 4: Simplify right side
    15,543.72x = 181,695,479.07
  5. Step 5: Solve for x
    x = 181,695,479.07/15,543.72
  6. Step 6: Final answer
    x = 11,689.32

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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.