Home / 15,431.07-21,294.99-8,357.55

Finding the Fourth Proportional to 15,431.07, 21,294.99 and 8,357.55

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Solution

The fourth proportional to 15,431.07, 21,294.99 and 8,357.55 is: 11,533.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.07 : 21,294.99 = 8,357.55 : x
  2. Step 2: Convert to fraction form
    15,431.07/21,294.99 = 8,357.55/x
  3. Step 3: Cross multiply
    15,431.07x = 21,294.99 × 8,357.55
  4. Step 4: Simplify right side
    15,431.07x = 177,973,943.67
  5. Step 5: Solve for x
    x = 177,973,943.67/15,431.07
  6. Step 6: Final answer
    x = 11,533.48

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Double scale
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Similar ratio
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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.