Home / 15,525.60-21,440.64-9,871.02

Finding the Fourth Proportional to 15,525.60, 21,440.64 and 9,871.02

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Solution

The fourth proportional to 15,525.60, 21,440.64 and 9,871.02 is: 13,631.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,525.60 : 21,440.64 = 9,871.02 : x
  2. Step 2: Convert to fraction form
    15,525.60/21,440.64 = 9,871.02/x
  3. Step 3: Cross multiply
    15,525.60x = 21,440.64 × 9,871.02
  4. Step 4: Simplify right side
    15,525.60x = 211,640,986.25
  5. Step 5: Solve for x
    x = 211,640,986.25/15,525.60
  6. Step 6: Final answer
    x = 13,631.74

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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.