Home / 15,897.78-21,861.12-13,798.26

Finding the Fourth Proportional to 15,897.78, 21,861.12 and 13,798.26

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Solution

The fourth proportional to 15,897.78, 21,861.12 and 13,798.26 is: 18,974.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,897.78 : 21,861.12 = 13,798.26 : x
  2. Step 2: Convert to fraction form
    15,897.78/21,861.12 = 13,798.26/x
  3. Step 3: Cross multiply
    15,897.78x = 21,861.12 × 13,798.26
  4. Step 4: Simplify right side
    15,897.78x = 301,645,417.65
  5. Step 5: Solve for x
    x = 301,645,417.65/15,897.78
  6. Step 6: Final answer
    x = 18,974.06

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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.