Home / 25,678.80-38,518.20-13,181.40

Finding the Fourth Proportional to 25,678.80, 38,518.20 and 13,181.40

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Solution

The fourth proportional to 25,678.80, 38,518.20 and 13,181.40 is: 19,772.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,678.80 : 38,518.20 = 13,181.40 : x
  2. Step 2: Convert to fraction form
    25,678.80/38,518.20 = 13,181.40/x
  3. Step 3: Cross multiply
    25,678.80x = 38,518.20 × 13,181.40
  4. Step 4: Simplify right side
    25,678.80x = 507,723,801.48
  5. Step 5: Solve for x
    x = 507,723,801.48/25,678.80
  6. Step 6: Final answer
    x = 19,772.10

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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.