Home / 20,938.13-28,895.26-11,988.51

Finding the Fourth Proportional to 20,938.13, 28,895.26 and 11,988.51

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Solution

The fourth proportional to 20,938.13, 28,895.26 and 11,988.51 is: 16,544.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.13 : 28,895.26 = 11,988.51 : x
  2. Step 2: Convert to fraction form
    20,938.13/28,895.26 = 11,988.51/x
  3. Step 3: Cross multiply
    20,938.13x = 28,895.26 × 11,988.51
  4. Step 4: Simplify right side
    20,938.13x = 346,411,113.46
  5. Step 5: Solve for x
    x = 346,411,113.46/20,938.13
  6. Step 6: Final answer
    x = 16,544.51

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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.