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Finding the Fourth Proportional to 15,808.19, 21,815.04 and 8,637.95

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Solution

The fourth proportional to 15,808.19, 21,815.04 and 8,637.95 is: 11,920.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.19 : 21,815.04 = 8,637.95 : x
  2. Step 2: Convert to fraction form
    15,808.19/21,815.04 = 8,637.95/x
  3. Step 3: Cross multiply
    15,808.19x = 21,815.04 × 8,637.95
  4. Step 4: Simplify right side
    15,808.19x = 188,437,224.77
  5. Step 5: Solve for x
    x = 188,437,224.77/15,808.19
  6. Step 6: Final answer
    x = 11,920.23

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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.