Home / 15,665.85-21,618.93-9,378.22

Finding the Fourth Proportional to 15,665.85, 21,618.93 and 9,378.22

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Solution

The fourth proportional to 15,665.85, 21,618.93 and 9,378.22 is: 12,941.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.85 : 21,618.93 = 9,378.22 : x
  2. Step 2: Convert to fraction form
    15,665.85/21,618.93 = 9,378.22/x
  3. Step 3: Cross multiply
    15,665.85x = 21,618.93 × 9,378.22
  4. Step 4: Simplify right side
    15,665.85x = 202,747,081.70
  5. Step 5: Solve for x
    x = 202,747,081.70/15,665.85
  6. Step 6: Final answer
    x = 12,941.98

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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.