Home / 10,890.64-15,029.40-6,174.80

Finding the Fourth Proportional to 10,890.64, 15,029.40 and 6,174.80

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Solution

The fourth proportional to 10,890.64, 15,029.40 and 6,174.80 is: 8,521.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.64 : 15,029.40 = 6,174.80 : x
  2. Step 2: Convert to fraction form
    10,890.64/15,029.40 = 6,174.80/x
  3. Step 3: Cross multiply
    10,890.64x = 15,029.40 × 6,174.80
  4. Step 4: Simplify right side
    10,890.64x = 92,803,539.12
  5. Step 5: Solve for x
    x = 92,803,539.12/10,890.64
  6. Step 6: Final answer
    x = 8,521.40

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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.