Home / 13,288.80-19,904.40-8,623.20

Finding the Fourth Proportional to 13,288.80, 19,904.40 and 8,623.20

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Solution

The fourth proportional to 13,288.80, 19,904.40 and 8,623.20 is: 12,916.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.80 : 19,904.40 = 8,623.20 : x
  2. Step 2: Convert to fraction form
    13,288.80/19,904.40 = 8,623.20/x
  3. Step 3: Cross multiply
    13,288.80x = 19,904.40 × 8,623.20
  4. Step 4: Simplify right side
    13,288.80x = 171,639,622.08
  5. Step 5: Solve for x
    x = 171,639,622.08/13,288.80
  6. Step 6: Final answer
    x = 12,916.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.