Home / 30,509.12-45,728.55-11,780.91

Finding the Fourth Proportional to 30,509.12, 45,728.55 and 11,780.91

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Solution

The fourth proportional to 30,509.12, 45,728.55 and 11,780.91 is: 17,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,509.12 : 45,728.55 = 11,780.91 : x
  2. Step 2: Convert to fraction form
    30,509.12/45,728.55 = 11,780.91/x
  3. Step 3: Cross multiply
    30,509.12x = 45,728.55 × 11,780.91
  4. Step 4: Simplify right side
    30,509.12x = 538,723,931.98
  5. Step 5: Solve for x
    x = 538,723,931.98/30,509.12
  6. Step 6: Final answer
    x = 17,657.80

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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.