Home / 15,805.50-21,810.80-8,730.56

Finding the Fourth Proportional to 15,805.50, 21,810.80 and 8,730.56

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Solution

The fourth proportional to 15,805.50, 21,810.80 and 8,730.56 is: 12,047.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.50 : 21,810.80 = 8,730.56 : x
  2. Step 2: Convert to fraction form
    15,805.50/21,810.80 = 8,730.56/x
  3. Step 3: Cross multiply
    15,805.50x = 21,810.80 × 8,730.56
  4. Step 4: Simplify right side
    15,805.50x = 190,420,498.05
  5. Step 5: Solve for x
    x = 190,420,498.05/15,805.50
  6. Step 6: Final answer
    x = 12,047.74

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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.