Home / 15,315.57-21,133.98-8,599.66

Finding the Fourth Proportional to 15,315.57, 21,133.98 and 8,599.66

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Solution

The fourth proportional to 15,315.57, 21,133.98 and 8,599.66 is: 11,866.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.57 : 21,133.98 = 8,599.66 : x
  2. Step 2: Convert to fraction form
    15,315.57/21,133.98 = 8,599.66/x
  3. Step 3: Cross multiply
    15,315.57x = 21,133.98 × 8,599.66
  4. Step 4: Simplify right side
    15,315.57x = 181,745,042.45
  5. Step 5: Solve for x
    x = 181,745,042.45/15,315.57
  6. Step 6: Final answer
    x = 11,866.68

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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.