Home / 12,875.40-19,298.70-5,478.60

Finding the Fourth Proportional to 12,875.40, 19,298.70 and 5,478.60

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Solution

The fourth proportional to 12,875.40, 19,298.70 and 5,478.60 is: 8,211.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,875.40 : 19,298.70 = 5,478.60 : x
  2. Step 2: Convert to fraction form
    12,875.40/19,298.70 = 5,478.60/x
  3. Step 3: Cross multiply
    12,875.40x = 19,298.70 × 5,478.60
  4. Step 4: Simplify right side
    12,875.40x = 105,729,857.82
  5. Step 5: Solve for x
    x = 105,729,857.82/12,875.40
  6. Step 6: Final answer
    x = 8,211.77

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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.