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Finding the Fourth Proportional to 18,420.16, 25,419.06 and 11,262.06

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Solution

The fourth proportional to 18,420.16, 25,419.06 and 11,262.06 is: 15,541.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.16 : 25,419.06 = 11,262.06 : x
  2. Step 2: Convert to fraction form
    18,420.16/25,419.06 = 11,262.06/x
  3. Step 3: Cross multiply
    18,420.16x = 25,419.06 × 11,262.06
  4. Step 4: Simplify right side
    18,420.16x = 286,270,978.86
  5. Step 5: Solve for x
    x = 286,270,978.86/18,420.16
  6. Step 6: Final answer
    x = 15,541.18

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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.