Home / 15,429.90-21,293.01-8,356.26

Finding the Fourth Proportional to 15,429.90, 21,293.01 and 8,356.26

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Solution

The fourth proportional to 15,429.90, 21,293.01 and 8,356.26 is: 11,531.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.90 : 21,293.01 = 8,356.26 : x
  2. Step 2: Convert to fraction form
    15,429.90/21,293.01 = 8,356.26/x
  3. Step 3: Cross multiply
    15,429.90x = 21,293.01 × 8,356.26
  4. Step 4: Simplify right side
    15,429.90x = 177,929,927.74
  5. Step 5: Solve for x
    x = 177,929,927.74/15,429.90
  6. Step 6: Final answer
    x = 11,531.50

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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.