Home / 39,780.61-54,897.64-21,875.75

Finding the Fourth Proportional to 39,780.61, 54,897.64 and 21,875.75

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Solution

The fourth proportional to 39,780.61, 54,897.64 and 21,875.75 is: 30,188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.61 : 54,897.64 = 21,875.75 : x
  2. Step 2: Convert to fraction form
    39,780.61/54,897.64 = 21,875.75/x
  3. Step 3: Cross multiply
    39,780.61x = 54,897.64 × 21,875.75
  4. Step 4: Simplify right side
    39,780.61x = 1,200,927,048.23
  5. Step 5: Solve for x
    x = 1,200,927,048.23/39,780.61
  6. Step 6: Final answer
    x = 30,188.75

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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.