Home / 18,345.90-25,290.72-13,558.80

Finding the Fourth Proportional to 18,345.90, 25,290.72 and 13,558.80

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Solution

The fourth proportional to 18,345.90, 25,290.72 and 13,558.80 is: 18,691.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,345.90 : 25,290.72 = 13,558.80 : x
  2. Step 2: Convert to fraction form
    18,345.90/25,290.72 = 13,558.80/x
  3. Step 3: Cross multiply
    18,345.90x = 25,290.72 × 13,558.80
  4. Step 4: Simplify right side
    18,345.90x = 342,911,814.34
  5. Step 5: Solve for x
    x = 342,911,814.34/18,345.90
  6. Step 6: Final answer
    x = 18,691.47

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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.