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Finding the Fourth Proportional to 42,913, 64,369.59 and 18,289

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Solution

The fourth proportional to 42,913, 64,369.59 and 18,289 is: 27,433.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,913 : 64,369.59 = 18,289 : x
  2. Step 2: Convert to fraction form
    42,913/64,369.59 = 18,289/x
  3. Step 3: Cross multiply
    42,913x = 64,369.59 × 18,289
  4. Step 4: Simplify right side
    42,913x = 1,177,255,431.51
  5. Step 5: Solve for x
    x = 1,177,255,431.51/42,913
  6. Step 6: Final answer
    x = 27,433.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.