Home / 13,808.16-20,681.36-9,900.72

Finding the Fourth Proportional to 13,808.16, 20,681.36 and 9,900.72

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Solution

The fourth proportional to 13,808.16, 20,681.36 and 9,900.72 is: 14,828.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.16 : 20,681.36 = 9,900.72 : x
  2. Step 2: Convert to fraction form
    13,808.16/20,681.36 = 9,900.72/x
  3. Step 3: Cross multiply
    13,808.16x = 20,681.36 × 9,900.72
  4. Step 4: Simplify right side
    13,808.16x = 204,760,354.58
  5. Step 5: Solve for x
    x = 204,760,354.58/13,808.16
  6. Step 6: Final answer
    x = 14,828.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.