Home / 38,890.09-53,665.14-21,888.91

Finding the Fourth Proportional to 38,890.09, 53,665.14 and 21,888.91

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Solution

The fourth proportional to 38,890.09, 53,665.14 and 21,888.91 is: 30,204.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,890.09 : 53,665.14 = 21,888.91 : x
  2. Step 2: Convert to fraction form
    38,890.09/53,665.14 = 21,888.91/x
  3. Step 3: Cross multiply
    38,890.09x = 53,665.14 × 21,888.91
  4. Step 4: Simplify right side
    38,890.09x = 1,174,671,419.60
  5. Step 5: Solve for x
    x = 1,174,671,419.60/38,890.09
  6. Step 6: Final answer
    x = 30,204.90

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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.