Home / 12,758.60-19,116.30-10,555.40

Finding the Fourth Proportional to 12,758.60, 19,116.30 and 10,555.40

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Solution

The fourth proportional to 12,758.60, 19,116.30 and 10,555.40 is: 15,815.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,758.60 : 19,116.30 = 10,555.40 : x
  2. Step 2: Convert to fraction form
    12,758.60/19,116.30 = 10,555.40/x
  3. Step 3: Cross multiply
    12,758.60x = 19,116.30 × 10,555.40
  4. Step 4: Simplify right side
    12,758.60x = 201,780,193.02
  5. Step 5: Solve for x
    x = 201,780,193.02/12,758.60
  6. Step 6: Final answer
    x = 15,815.23

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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.