Home / 38,688.09-53,389.73-21,921.09

Finding the Fourth Proportional to 38,688.09, 53,389.73 and 21,921.09

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Solution

The fourth proportional to 38,688.09, 53,389.73 and 21,921.09 is: 30,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,688.09 : 53,389.73 = 21,921.09 : x
  2. Step 2: Convert to fraction form
    38,688.09/53,389.73 = 21,921.09/x
  3. Step 3: Cross multiply
    38,688.09x = 53,389.73 × 21,921.09
  4. Step 4: Simplify right side
    38,688.09x = 1,170,360,966.80
  5. Step 5: Solve for x
    x = 1,170,360,966.80/38,688.09
  6. Step 6: Final answer
    x = 30,251.20

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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.