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Finding the Fourth Proportional to 58,459.51, 87,679.54 and 21,012

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Solution

The fourth proportional to 58,459.51, 87,679.54 and 21,012 is: 31,514.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,459.51 : 87,679.54 = 21,012 : x
  2. Step 2: Convert to fraction form
    58,459.51/87,679.54 = 21,012/x
  3. Step 3: Cross multiply
    58,459.51x = 87,679.54 × 21,012
  4. Step 4: Simplify right side
    58,459.51x = 1,842,322,494.48
  5. Step 5: Solve for x
    x = 1,842,322,494.48/58,459.51
  6. Step 6: Final answer
    x = 31,514.50

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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.