Home / 18,420.93-25,400.73-12,442.21

Finding the Fourth Proportional to 18,420.93, 25,400.73 and 12,442.21

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Solution

The fourth proportional to 18,420.93, 25,400.73 and 12,442.21 is: 17,156.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.93 : 25,400.73 = 12,442.21 : x
  2. Step 2: Convert to fraction form
    18,420.93/25,400.73 = 12,442.21/x
  3. Step 3: Cross multiply
    18,420.93x = 25,400.73 × 12,442.21
  4. Step 4: Simplify right side
    18,420.93x = 316,041,216.81
  5. Step 5: Solve for x
    x = 316,041,216.81/18,420.93
  6. Step 6: Final answer
    x = 17,156.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.