Home / 21,779.22-30,064.53-14,715.21

Finding the Fourth Proportional to 21,779.22, 30,064.53 and 14,715.21

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Solution

The fourth proportional to 21,779.22, 30,064.53 and 14,715.21 is: 20,313.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.22 : 30,064.53 = 14,715.21 : x
  2. Step 2: Convert to fraction form
    21,779.22/30,064.53 = 14,715.21/x
  3. Step 3: Cross multiply
    21,779.22x = 30,064.53 × 14,715.21
  4. Step 4: Simplify right side
    21,779.22x = 442,405,872.50
  5. Step 5: Solve for x
    x = 442,405,872.50/21,779.22
  6. Step 6: Final answer
    x = 20,313.21

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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.