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Finding the Fourth Proportional to 21,779.89, 32,674.08 and 6,987.67

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Solution

The fourth proportional to 21,779.89, 32,674.08 and 6,987.67 is: 10,482.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.89 : 32,674.08 = 6,987.67 : x
  2. Step 2: Convert to fraction form
    21,779.89/32,674.08 = 6,987.67/x
  3. Step 3: Cross multiply
    21,779.89x = 32,674.08 × 6,987.67
  4. Step 4: Simplify right side
    21,779.89x = 228,315,606.91
  5. Step 5: Solve for x
    x = 228,315,606.91/21,779.89
  6. Step 6: Final answer
    x = 10,482.86

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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.