Home / 12,985.76-19,487.26-4,777.76

Finding the Fourth Proportional to 12,985.76, 19,487.26 and 4,777.76

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Solution

The fourth proportional to 12,985.76, 19,487.26 and 4,777.76 is: 7,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.76 : 19,487.26 = 4,777.76 : x
  2. Step 2: Convert to fraction form
    12,985.76/19,487.26 = 4,777.76/x
  3. Step 3: Cross multiply
    12,985.76x = 19,487.26 × 4,777.76
  4. Step 4: Simplify right side
    12,985.76x = 93,105,451.34
  5. Step 5: Solve for x
    x = 93,105,451.34/12,985.76
  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.