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Finding the Fourth Proportional to 21,655.45, 32,483.13 and 6,865.53

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Solution

The fourth proportional to 21,655.45, 32,483.13 and 6,865.53 is: 10,298.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.45 : 32,483.13 = 6,865.53 : x
  2. Step 2: Convert to fraction form
    21,655.45/32,483.13 = 6,865.53/x
  3. Step 3: Cross multiply
    21,655.45x = 32,483.13 × 6,865.53
  4. Step 4: Simplify right side
    21,655.45x = 223,013,903.51
  5. Step 5: Solve for x
    x = 223,013,903.51/21,655.45
  6. Step 6: Final answer
    x = 10,298.28

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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.