Home / 12,985.74-19,478.61-8,371.98

Finding the Fourth Proportional to 12,985.74, 19,478.61 and 8,371.98

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Solution

The fourth proportional to 12,985.74, 19,478.61 and 8,371.98 is: 12,557.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.74 : 19,478.61 = 8,371.98 : x
  2. Step 2: Convert to fraction form
    12,985.74/19,478.61 = 8,371.98/x
  3. Step 3: Cross multiply
    12,985.74x = 19,478.61 × 8,371.98
  4. Step 4: Simplify right side
    12,985.74x = 163,074,533.35
  5. Step 5: Solve for x
    x = 163,074,533.35/12,985.74
  6. Step 6: Final answer
    x = 12,557.97

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Similar ratio
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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.