Home / 13,977.16-20,956.02-5,209.72

Finding the Fourth Proportional to 13,977.16, 20,956.02 and 5,209.72

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Solution

The fourth proportional to 13,977.16, 20,956.02 and 5,209.72 is: 7,810.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.16 : 20,956.02 = 5,209.72 : x
  2. Step 2: Convert to fraction form
    13,977.16/20,956.02 = 5,209.72/x
  3. Step 3: Cross multiply
    13,977.16x = 20,956.02 × 5,209.72
  4. Step 4: Simplify right side
    13,977.16x = 109,174,996.51
  5. Step 5: Solve for x
    x = 109,174,996.51/13,977.16
  6. Step 6: Final answer
    x = 7,810.96

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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.