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Finding the Fourth Proportional to 18,580.68, 25,643.12 and 10,621.40

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Solution

The fourth proportional to 18,580.68, 25,643.12 and 10,621.40 is: 14,658.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,580.68 : 25,643.12 = 10,621.40 : x
  2. Step 2: Convert to fraction form
    18,580.68/25,643.12 = 10,621.40/x
  3. Step 3: Cross multiply
    18,580.68x = 25,643.12 × 10,621.40
  4. Step 4: Simplify right side
    18,580.68x = 272,365,653.45
  5. Step 5: Solve for x
    x = 272,365,653.45/18,580.68
  6. Step 6: Final answer
    x = 14,658.54

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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.