Home / 21,779.10-30,064.35-14,715.09

Finding the Fourth Proportional to 21,779.10, 30,064.35 and 14,715.09

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Solution

The fourth proportional to 21,779.10, 30,064.35 and 14,715.09 is: 20,313.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.10 : 30,064.35 = 14,715.09 : x
  2. Step 2: Convert to fraction form
    21,779.10/30,064.35 = 14,715.09/x
  3. Step 3: Cross multiply
    21,779.10x = 30,064.35 × 14,715.09
  4. Step 4: Simplify right side
    21,779.10x = 442,399,616.04
  5. Step 5: Solve for x
    x = 442,399,616.04/21,779.10
  6. Step 6: Final answer
    x = 20,313.03

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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.