Home / 52,615.08-78,871.32-21,015.72

Finding the Fourth Proportional to 52,615.08, 78,871.32 and 21,015.72

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Solution

The fourth proportional to 52,615.08, 78,871.32 and 21,015.72 is: 31,503.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,615.08 : 78,871.32 = 21,015.72 : x
  2. Step 2: Convert to fraction form
    52,615.08/78,871.32 = 21,015.72/x
  3. Step 3: Cross multiply
    52,615.08x = 78,871.32 × 21,015.72
  4. Step 4: Simplify right side
    52,615.08x = 1,657,537,577.15
  5. Step 5: Solve for x
    x = 1,657,537,577.15/52,615.08
  6. Step 6: Final answer
    x = 31,503.09

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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.