Home / 30,123.16-45,185.04-7,939.72

Finding the Fourth Proportional to 30,123.16, 45,185.04 and 7,939.72

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Solution

The fourth proportional to 30,123.16, 45,185.04 and 7,939.72 is: 11,909.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,123.16 : 45,185.04 = 7,939.72 : x
  2. Step 2: Convert to fraction form
    30,123.16/45,185.04 = 7,939.72/x
  3. Step 3: Cross multiply
    30,123.16x = 45,185.04 × 7,939.72
  4. Step 4: Simplify right side
    30,123.16x = 358,756,565.79
  5. Step 5: Solve for x
    x = 358,756,565.79/30,123.16
  6. Step 6: Final answer
    x = 11,909.66

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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.