Home / 15,392.78-21,242.05-8,319.21

Finding the Fourth Proportional to 15,392.78, 21,242.05 and 8,319.21

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Solution

The fourth proportional to 15,392.78, 21,242.05 and 8,319.21 is: 11,480.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,392.78 : 21,242.05 = 8,319.21 : x
  2. Step 2: Convert to fraction form
    15,392.78/21,242.05 = 8,319.21/x
  3. Step 3: Cross multiply
    15,392.78x = 21,242.05 × 8,319.21
  4. Step 4: Simplify right side
    15,392.78x = 176,717,074.78
  5. Step 5: Solve for x
    x = 176,717,074.78/15,392.78
  6. Step 6: Final answer
    x = 11,480.52

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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.