Home / 15,354.32-21,188.72-8,639.95

Finding the Fourth Proportional to 15,354.32, 21,188.72 and 8,639.95

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Solution

The fourth proportional to 15,354.32, 21,188.72 and 8,639.95 is: 11,922.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,354.32 : 21,188.72 = 8,639.95 : x
  2. Step 2: Convert to fraction form
    15,354.32/21,188.72 = 8,639.95/x
  3. Step 3: Cross multiply
    15,354.32x = 21,188.72 × 8,639.95
  4. Step 4: Simplify right side
    15,354.32x = 183,069,385.19
  5. Step 5: Solve for x
    x = 183,069,385.19/15,354.32
  6. Step 6: Final answer
    x = 11,922.99

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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.