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Finding the Fourth Proportional to 25,316.40, 37,974.60 and 21,860.40

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Solution

The fourth proportional to 25,316.40, 37,974.60 and 21,860.40 is: 32,790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,316.40 : 37,974.60 = 21,860.40 : x
  2. Step 2: Convert to fraction form
    25,316.40/37,974.60 = 21,860.40/x
  3. Step 3: Cross multiply
    25,316.40x = 37,974.60 × 21,860.40
  4. Step 4: Simplify right side
    25,316.40x = 830,139,945.84
  5. Step 5: Solve for x
    x = 830,139,945.84/25,316.40
  6. Step 6: Final answer
    x = 32,790.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.