Home / 15,429.95-21,293.28-8,356.35

Finding the Fourth Proportional to 15,429.95, 21,293.28 and 8,356.35

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Solution

The fourth proportional to 15,429.95, 21,293.28 and 8,356.35 is: 11,531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.95 : 21,293.28 = 8,356.35 : x
  2. Step 2: Convert to fraction form
    15,429.95/21,293.28 = 8,356.35/x
  3. Step 3: Cross multiply
    15,429.95x = 21,293.28 × 8,356.35
  4. Step 4: Simplify right side
    15,429.95x = 177,934,100.33
  5. Step 5: Solve for x
    x = 177,934,100.33/15,429.95
  6. Step 6: Final answer
    x = 11,531.74

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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.