Home / 10,987.40-16,490.70-8,790.60

Finding the Fourth Proportional to 10,987.40, 16,490.70 and 8,790.60

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Solution

The fourth proportional to 10,987.40, 16,490.70 and 8,790.60 is: 13,193.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.40 : 16,490.70 = 8,790.60 : x
  2. Step 2: Convert to fraction form
    10,987.40/16,490.70 = 8,790.60/x
  3. Step 3: Cross multiply
    10,987.40x = 16,490.70 × 8,790.60
  4. Step 4: Simplify right side
    10,987.40x = 144,963,147.42
  5. Step 5: Solve for x
    x = 144,963,147.42/10,987.40
  6. Step 6: Final answer
    x = 13,193.58

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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.