Home / 30,438.10-45,633.25-19,342.72

Finding the Fourth Proportional to 30,438.10, 45,633.25 and 19,342.72

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Solution

The fourth proportional to 30,438.10, 45,633.25 and 19,342.72 is: 28,998.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438.10 : 45,633.25 = 19,342.72 : x
  2. Step 2: Convert to fraction form
    30,438.10/45,633.25 = 19,342.72/x
  3. Step 3: Cross multiply
    30,438.10x = 45,633.25 × 19,342.72
  4. Step 4: Simplify right side
    30,438.10x = 882,671,177.44
  5. Step 5: Solve for x
    x = 882,671,177.44/30,438.10
  6. Step 6: Final answer
    x = 28,998.89

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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.