Home / 39,715.31-54,807.28-21,811.53

Finding the Fourth Proportional to 39,715.31, 54,807.28 and 21,811.53

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Solution

The fourth proportional to 39,715.31, 54,807.28 and 21,811.53 is: 30,099.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,715.31 : 54,807.28 = 21,811.53 : x
  2. Step 2: Convert to fraction form
    39,715.31/54,807.28 = 21,811.53/x
  3. Step 3: Cross multiply
    39,715.31x = 54,807.28 × 21,811.53
  4. Step 4: Simplify right side
    39,715.31x = 1,195,430,597.34
  5. Step 5: Solve for x
    x = 1,195,430,597.34/39,715.31
  6. Step 6: Final answer
    x = 30,099.99

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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.