Home / 25,511.20-38,266.80-12,389.20

Finding the Fourth Proportional to 25,511.20, 38,266.80 and 12,389.20

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Solution

The fourth proportional to 25,511.20, 38,266.80 and 12,389.20 is: 18,583.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,511.20 : 38,266.80 = 12,389.20 : x
  2. Step 2: Convert to fraction form
    25,511.20/38,266.80 = 12,389.20/x
  3. Step 3: Cross multiply
    25,511.20x = 38,266.80 × 12,389.20
  4. Step 4: Simplify right side
    25,511.20x = 474,095,038.56
  5. Step 5: Solve for x
    x = 474,095,038.56/25,511.20
  6. Step 6: Final answer
    x = 18,583.80

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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.