Home / 15,631.68-21,571.20-9,340.80

Finding the Fourth Proportional to 15,631.68, 21,571.20 and 9,340.80

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Solution

The fourth proportional to 15,631.68, 21,571.20 and 9,340.80 is: 12,889.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.68 : 21,571.20 = 9,340.80 : x
  2. Step 2: Convert to fraction form
    15,631.68/21,571.20 = 9,340.80/x
  3. Step 3: Cross multiply
    15,631.68x = 21,571.20 × 9,340.80
  4. Step 4: Simplify right side
    15,631.68x = 201,492,264.96
  5. Step 5: Solve for x
    x = 201,492,264.96/15,631.68
  6. Step 6: Final answer
    x = 12,889.99

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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.