Home / 13,459.92-18,574.20-7,870.80

Finding the Fourth Proportional to 13,459.92, 18,574.20 and 7,870.80

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Solution

The fourth proportional to 13,459.92, 18,574.20 and 7,870.80 is: 10,861.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,459.92 : 18,574.20 = 7,870.80 : x
  2. Step 2: Convert to fraction form
    13,459.92/18,574.20 = 7,870.80/x
  3. Step 3: Cross multiply
    13,459.92x = 18,574.20 × 7,870.80
  4. Step 4: Simplify right side
    13,459.92x = 146,193,813.36
  5. Step 5: Solve for x
    x = 146,193,813.36/13,459.92
  6. Step 6: Final answer
    x = 10,861.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.