Home / 27,938.79-38,588.54-21,519.81

Finding the Fourth Proportional to 27,938.79, 38,588.54 and 21,519.81

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Solution

The fourth proportional to 27,938.79, 38,588.54 and 21,519.81 is: 29,722.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,938.79 : 38,588.54 = 21,519.81 : x
  2. Step 2: Convert to fraction form
    27,938.79/38,588.54 = 21,519.81/x
  3. Step 3: Cross multiply
    27,938.79x = 38,588.54 × 21,519.81
  4. Step 4: Simplify right side
    27,938.79x = 830,417,941.38
  5. Step 5: Solve for x
    x = 830,417,941.38/27,938.79
  6. Step 6: Final answer
    x = 29,722.76

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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.