Home / 14,139.98-21,206.45-4,779.79

Finding the Fourth Proportional to 14,139.98, 21,206.45 and 4,779.79

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Solution

The fourth proportional to 14,139.98, 21,206.45 and 4,779.79 is: 7,168.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.98 : 21,206.45 = 4,779.79 : x
  2. Step 2: Convert to fraction form
    14,139.98/21,206.45 = 4,779.79/x
  3. Step 3: Cross multiply
    14,139.98x = 21,206.45 × 4,779.79
  4. Step 4: Simplify right side
    14,139.98x = 101,362,336.58
  5. Step 5: Solve for x
    x = 101,362,336.58/14,139.98
  6. Step 6: Final answer
    x = 7,168.49

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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.