Home / 20,558.65-28,342.70-13,001.20

Finding the Fourth Proportional to 20,558.65, 28,342.70 and 13,001.20

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Solution

The fourth proportional to 20,558.65, 28,342.70 and 13,001.20 is: 17,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.65 : 28,342.70 = 13,001.20 : x
  2. Step 2: Convert to fraction form
    20,558.65/28,342.70 = 13,001.20/x
  3. Step 3: Cross multiply
    20,558.65x = 28,342.70 × 13,001.20
  4. Step 4: Simplify right side
    20,558.65x = 368,489,111.24
  5. Step 5: Solve for x
    x = 368,489,111.24/20,558.65
  6. Step 6: Final answer
    x = 17,923.80

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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.