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Finding the Fourth Proportional to 18,555.63, 25,607.07 and 10,172.13

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Solution

The fourth proportional to 18,555.63, 25,607.07 and 10,172.13 is: 14,037.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.63 : 25,607.07 = 10,172.13 : x
  2. Step 2: Convert to fraction form
    18,555.63/25,607.07 = 10,172.13/x
  3. Step 3: Cross multiply
    18,555.63x = 25,607.07 × 10,172.13
  4. Step 4: Simplify right side
    18,555.63x = 260,478,444.96
  5. Step 5: Solve for x
    x = 260,478,444.96/18,555.63
  6. Step 6: Final answer
    x = 14,037.70

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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.