Home / 28,938.24-39,916.80-20,989.44

Finding the Fourth Proportional to 28,938.24, 39,916.80 and 20,989.44

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Solution

The fourth proportional to 28,938.24, 39,916.80 and 20,989.44 is: 28,952.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,938.24 : 39,916.80 = 20,989.44 : x
  2. Step 2: Convert to fraction form
    28,938.24/39,916.80 = 20,989.44/x
  3. Step 3: Cross multiply
    28,938.24x = 39,916.80 × 20,989.44
  4. Step 4: Simplify right side
    28,938.24x = 837,831,278.59
  5. Step 5: Solve for x
    x = 837,831,278.59/28,938.24
  6. Step 6: Final answer
    x = 28,952.39

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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.