Home / 25,415.78-38,148.30-12,277.40

Finding the Fourth Proportional to 25,415.78, 38,148.30 and 12,277.40

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Solution

The fourth proportional to 25,415.78, 38,148.30 and 12,277.40 is: 18,428.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,415.78 : 38,148.30 = 12,277.40 : x
  2. Step 2: Convert to fraction form
    25,415.78/38,148.30 = 12,277.40/x
  3. Step 3: Cross multiply
    25,415.78x = 38,148.30 × 12,277.40
  4. Step 4: Simplify right side
    25,415.78x = 468,361,938.42
  5. Step 5: Solve for x
    x = 468,361,938.42/25,415.78
  6. Step 6: Final answer
    x = 18,428.00

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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.