Home / 21,639.50-29,862.51-15,362.81

Finding the Fourth Proportional to 21,639.50, 29,862.51 and 15,362.81

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Solution

The fourth proportional to 21,639.50, 29,862.51 and 15,362.81 is: 21,200.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.50 : 29,862.51 = 15,362.81 : x
  2. Step 2: Convert to fraction form
    21,639.50/29,862.51 = 15,362.81/x
  3. Step 3: Cross multiply
    21,639.50x = 29,862.51 × 15,362.81
  4. Step 4: Simplify right side
    21,639.50x = 458,772,067.25
  5. Step 5: Solve for x
    x = 458,772,067.25/21,639.50
  6. Step 6: Final answer
    x = 21,200.68

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1.5x scale

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.