Home / 20,938.63-28,895.95-11,989.01

Finding the Fourth Proportional to 20,938.63, 28,895.95 and 11,989.01

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Solution

The fourth proportional to 20,938.63, 28,895.95 and 11,989.01 is: 16,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.63 : 28,895.95 = 11,989.01 : x
  2. Step 2: Convert to fraction form
    20,938.63/28,895.95 = 11,989.01/x
  3. Step 3: Cross multiply
    20,938.63x = 28,895.95 × 11,989.01
  4. Step 4: Simplify right side
    20,938.63x = 346,433,833.51
  5. Step 5: Solve for x
    x = 346,433,833.51/20,938.63
  6. Step 6: Final answer
    x = 16,545.20

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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.