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Finding the Fourth Proportional to 25,860.66, 38,790.98 and 7,140.07

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Solution

The fourth proportional to 25,860.66, 38,790.98 and 7,140.07 is: 10,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,860.66 : 38,790.98 = 7,140.07 : x
  2. Step 2: Convert to fraction form
    25,860.66/38,790.98 = 7,140.07/x
  3. Step 3: Cross multiply
    25,860.66x = 38,790.98 × 7,140.07
  4. Step 4: Simplify right side
    25,860.66x = 276,970,312.57
  5. Step 5: Solve for x
    x = 276,970,312.57/25,860.66
  6. Step 6: Final answer
    x = 10,710.10

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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.