Home / 15,355.32-21,190.10-8,640.95

Finding the Fourth Proportional to 15,355.32, 21,190.10 and 8,640.95

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Solution

The fourth proportional to 15,355.32, 21,190.10 and 8,640.95 is: 11,924.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.32 : 21,190.10 = 8,640.95 : x
  2. Step 2: Convert to fraction form
    15,355.32/21,190.10 = 8,640.95/x
  3. Step 3: Cross multiply
    15,355.32x = 21,190.10 × 8,640.95
  4. Step 4: Simplify right side
    15,355.32x = 183,102,498.42
  5. Step 5: Solve for x
    x = 183,102,498.42/15,355.32
  6. Step 6: Final answer
    x = 11,924.37

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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.