Home / 2,128.14-2,938.68-1,569.58

Finding the Fourth Proportional to 2,128.14, 2,938.68 and 1,569.58

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Solution

The fourth proportional to 2,128.14, 2,938.68 and 1,569.58 is: 2,167.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.14 : 2,938.68 = 1,569.58 : x
  2. Step 2: Convert to fraction form
    2,128.14/2,938.68 = 1,569.58/x
  3. Step 3: Cross multiply
    2,128.14x = 2,938.68 × 1,569.58
  4. Step 4: Simplify right side
    2,128.14x = 4,612,486.01
  5. Step 5: Solve for x
    x = 4,612,486.01/2,128.14
  6. Step 6: Final answer
    x = 2,167.38

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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.