Home / 15,813.28-21,823.88-8,740.20

Finding the Fourth Proportional to 15,813.28, 21,823.88 and 8,740.20

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Solution

The fourth proportional to 15,813.28, 21,823.88 and 8,740.20 is: 12,062.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.28 : 21,823.88 = 8,740.20 : x
  2. Step 2: Convert to fraction form
    15,813.28/21,823.88 = 8,740.20/x
  3. Step 3: Cross multiply
    15,813.28x = 21,823.88 × 8,740.20
  4. Step 4: Simplify right side
    15,813.28x = 190,745,075.98
  5. Step 5: Solve for x
    x = 190,745,075.98/15,813.28
  6. Step 6: Final answer
    x = 12,062.33

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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.