Home / 12,985.75-19,487.28-4,777.75

Finding the Fourth Proportional to 12,985.75, 19,487.28 and 4,777.75

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Solution

The fourth proportional to 12,985.75, 19,487.28 and 4,777.75 is: 7,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.75 : 19,487.28 = 4,777.75 : x
  2. Step 2: Convert to fraction form
    12,985.75/19,487.28 = 4,777.75/x
  3. Step 3: Cross multiply
    12,985.75x = 19,487.28 × 4,777.75
  4. Step 4: Simplify right side
    12,985.75x = 93,105,352.02
  5. Step 5: Solve for x
    x = 93,105,352.02/12,985.75
  6. Step 6: Final answer
    x = 7,169.81

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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.