Home / 20,554.46-28,345.90-13,643.40

Finding the Fourth Proportional to 20,554.46, 28,345.90 and 13,643.40

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Solution

The fourth proportional to 20,554.46, 28,345.90 and 13,643.40 is: 18,815.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.46 : 28,345.90 = 13,643.40 : x
  2. Step 2: Convert to fraction form
    20,554.46/28,345.90 = 13,643.40/x
  3. Step 3: Cross multiply
    20,554.46x = 28,345.90 × 13,643.40
  4. Step 4: Simplify right side
    20,554.46x = 386,734,452.06
  5. Step 5: Solve for x
    x = 386,734,452.06/20,554.46
  6. Step 6: Final answer
    x = 18,815.11

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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.