Home / 53,985.80-80,919.30-18,907.40

Finding the Fourth Proportional to 53,985.80, 80,919.30 and 18,907.40

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Solution

The fourth proportional to 53,985.80, 80,919.30 and 18,907.40 is: 28,340.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,985.80 : 80,919.30 = 18,907.40 : x
  2. Step 2: Convert to fraction form
    53,985.80/80,919.30 = 18,907.40/x
  3. Step 3: Cross multiply
    53,985.80x = 80,919.30 × 18,907.40
  4. Step 4: Simplify right side
    53,985.80x = 1,529,973,572.82
  5. Step 5: Solve for x
    x = 1,529,973,572.82/53,985.80
  6. Step 6: Final answer
    x = 28,340.30

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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.