Home / 15,354.25-21,188.95-8,639.99

Finding the Fourth Proportional to 15,354.25, 21,188.95 and 8,639.99

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Solution

The fourth proportional to 15,354.25, 21,188.95 and 8,639.99 is: 11,923.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,354.25 : 21,188.95 = 8,639.99 : x
  2. Step 2: Convert to fraction form
    15,354.25/21,188.95 = 8,639.99/x
  3. Step 3: Cross multiply
    15,354.25x = 21,188.95 × 8,639.99
  4. Step 4: Simplify right side
    15,354.25x = 183,072,188.57
  5. Step 5: Solve for x
    x = 183,072,188.57/15,354.25
  6. Step 6: Final answer
    x = 11,923.23

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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.