Home / 30,011.29-45,013.28-12,478.84

Finding the Fourth Proportional to 30,011.29, 45,013.28 and 12,478.84

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Solution

The fourth proportional to 30,011.29, 45,013.28 and 12,478.84 is: 18,716.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,011.29 : 45,013.28 = 12,478.84 : x
  2. Step 2: Convert to fraction form
    30,011.29/45,013.28 = 12,478.84/x
  3. Step 3: Cross multiply
    30,011.29x = 45,013.28 × 12,478.84
  4. Step 4: Simplify right side
    30,011.29x = 561,713,519.00
  5. Step 5: Solve for x
    x = 561,713,519.00/30,011.29
  6. Step 6: Final answer
    x = 18,716.74

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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.