Home / 13,985.30-20,977.78-5,663.06

Finding the Fourth Proportional to 13,985.30, 20,977.78 and 5,663.06

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Solution

The fourth proportional to 13,985.30, 20,977.78 and 5,663.06 is: 8,494.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.30 : 20,977.78 = 5,663.06 : x
  2. Step 2: Convert to fraction form
    13,985.30/20,977.78 = 5,663.06/x
  3. Step 3: Cross multiply
    13,985.30x = 20,977.78 × 5,663.06
  4. Step 4: Simplify right side
    13,985.30x = 118,798,426.81
  5. Step 5: Solve for x
    x = 118,798,426.81/13,985.30
  6. Step 6: Final answer
    x = 8,494.52

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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.