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Finding the Fourth Proportional to 18,803.58, 25,937.55 and 12,430.23

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Solution

The fourth proportional to 18,803.58, 25,937.55 and 12,430.23 is: 17,146.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.58 : 25,937.55 = 12,430.23 : x
  2. Step 2: Convert to fraction form
    18,803.58/25,937.55 = 12,430.23/x
  3. Step 3: Cross multiply
    18,803.58x = 25,937.55 × 12,430.23
  4. Step 4: Simplify right side
    18,803.58x = 322,409,712.14
  5. Step 5: Solve for x
    x = 322,409,712.14/18,803.58
  6. Step 6: Final answer
    x = 17,146.19

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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.