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Finding the Fourth Proportional to 15,810.60, 21,828.80 and 10,147.80

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Solution

The fourth proportional to 15,810.60, 21,828.80 and 10,147.80 is: 14,010.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.60 : 21,828.80 = 10,147.80 : x
  2. Step 2: Convert to fraction form
    15,810.60/21,828.80 = 10,147.80/x
  3. Step 3: Cross multiply
    15,810.60x = 21,828.80 × 10,147.80
  4. Step 4: Simplify right side
    15,810.60x = 221,514,296.64
  5. Step 5: Solve for x
    x = 221,514,296.64/15,810.60
  6. Step 6: Final answer
    x = 14,010.49

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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.