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Finding the Fourth Proportional to 15,806.48, 21,804.36 and 9,839.12

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Solution

The fourth proportional to 15,806.48, 21,804.36 and 9,839.12 is: 13,572.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,806.48 : 21,804.36 = 9,839.12 : x
  2. Step 2: Convert to fraction form
    15,806.48/21,804.36 = 9,839.12/x
  3. Step 3: Cross multiply
    15,806.48x = 21,804.36 × 9,839.12
  4. Step 4: Simplify right side
    15,806.48x = 214,535,714.56
  5. Step 5: Solve for x
    x = 214,535,714.56/15,806.48
  6. Step 6: Final answer
    x = 13,572.64

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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.