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Finding the Fourth Proportional to 18,345.63, 25,327.71 and 13,305

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Solution

The fourth proportional to 18,345.63, 25,327.71 and 13,305 is: 18,368.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,345.63 : 25,327.71 = 13,305 : x
  2. Step 2: Convert to fraction form
    18,345.63/25,327.71 = 13,305/x
  3. Step 3: Cross multiply
    18,345.63x = 25,327.71 × 13,305
  4. Step 4: Simplify right side
    18,345.63x = 336,985,181.55
  5. Step 5: Solve for x
    x = 336,985,181.55/18,345.63
  6. Step 6: Final answer
    x = 18,368.69

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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.