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Finding the Fourth Proportional to 15,828.08, 21,841.07 and 9,860.40

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Solution

The fourth proportional to 15,828.08, 21,841.07 and 9,860.40 is: 13,606.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,828.08 : 21,841.07 = 9,860.40 : x
  2. Step 2: Convert to fraction form
    15,828.08/21,841.07 = 9,860.40/x
  3. Step 3: Cross multiply
    15,828.08x = 21,841.07 × 9,860.40
  4. Step 4: Simplify right side
    15,828.08x = 215,361,637.33
  5. Step 5: Solve for x
    x = 215,361,637.33/15,828.08
  6. Step 6: Final answer
    x = 13,606.31

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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.