Home / 15,930.08-21,981.84-8,855.36

Finding the Fourth Proportional to 15,930.08, 21,981.84 and 8,855.36

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Solution

The fourth proportional to 15,930.08, 21,981.84 and 8,855.36 is: 12,219.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.08 : 21,981.84 = 8,855.36 : x
  2. Step 2: Convert to fraction form
    15,930.08/21,981.84 = 8,855.36/x
  3. Step 3: Cross multiply
    15,930.08x = 21,981.84 × 8,855.36
  4. Step 4: Simplify right side
    15,930.08x = 194,657,106.66
  5. Step 5: Solve for x
    x = 194,657,106.66/15,930.08
  6. Step 6: Final answer
    x = 12,219.47

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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.