Home / 20,569.79-28,386.45-11,138.36

Finding the Fourth Proportional to 20,569.79, 28,386.45 and 11,138.36

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Solution

The fourth proportional to 20,569.79, 28,386.45 and 11,138.36 is: 15,371.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.79 : 28,386.45 = 11,138.36 : x
  2. Step 2: Convert to fraction form
    20,569.79/28,386.45 = 11,138.36/x
  3. Step 3: Cross multiply
    20,569.79x = 28,386.45 × 11,138.36
  4. Step 4: Simplify right side
    20,569.79x = 316,178,357.29
  5. Step 5: Solve for x
    x = 316,178,357.29/20,569.79
  6. Step 6: Final answer
    x = 15,371.00

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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.