Home / 15,724.80-21,643.20-14,817.60

Finding the Fourth Proportional to 15,724.80, 21,643.20 and 14,817.60

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Solution

The fourth proportional to 15,724.80, 21,643.20 and 14,817.60 is: 20,394.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.80 : 21,643.20 = 14,817.60 : x
  2. Step 2: Convert to fraction form
    15,724.80/21,643.20 = 14,817.60/x
  3. Step 3: Cross multiply
    15,724.80x = 21,643.20 × 14,817.60
  4. Step 4: Simplify right side
    15,724.80x = 320,700,280.32
  5. Step 5: Solve for x
    x = 320,700,280.32/15,724.80
  6. Step 6: Final answer
    x = 20,394.55

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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.