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Finding the Fourth Proportional to 21,779.94, 32,666.84 and 6,986.93

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Solution

The fourth proportional to 21,779.94, 32,666.84 and 6,986.93 is: 10,479.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.94 : 32,666.84 = 6,986.93 : x
  2. Step 2: Convert to fraction form
    21,779.94/32,666.84 = 6,986.93/x
  3. Step 3: Cross multiply
    21,779.94x = 32,666.84 × 6,986.93
  4. Step 4: Simplify right side
    21,779.94x = 228,240,971.13
  5. Step 5: Solve for x
    x = 228,240,971.13/21,779.94
  6. Step 6: Final answer
    x = 10,479.41

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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.