Home / 10,521.18-15,779.07-3,123.63

Finding the Fourth Proportional to 10,521.18, 15,779.07 and 3,123.63

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Solution

The fourth proportional to 10,521.18, 15,779.07 and 3,123.63 is: 4,684.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.18 : 15,779.07 = 3,123.63 : x
  2. Step 2: Convert to fraction form
    10,521.18/15,779.07 = 3,123.63/x
  3. Step 3: Cross multiply
    10,521.18x = 15,779.07 × 3,123.63
  4. Step 4: Simplify right side
    10,521.18x = 49,287,976.42
  5. Step 5: Solve for x
    x = 49,287,976.42/10,521.18
  6. Step 6: Final answer
    x = 4,684.64

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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.