Home / 30,437.45-45,659.82-12,905

Finding the Fourth Proportional to 30,437.45, 45,659.82 and 12,905

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Solution

The fourth proportional to 30,437.45, 45,659.82 and 12,905 is: 19,359.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,437.45 : 45,659.82 = 12,905 : x
  2. Step 2: Convert to fraction form
    30,437.45/45,659.82 = 12,905/x
  3. Step 3: Cross multiply
    30,437.45x = 45,659.82 × 12,905
  4. Step 4: Simplify right side
    30,437.45x = 589,239,977.10
  5. Step 5: Solve for x
    x = 589,239,977.10/30,437.45
  6. Step 6: Final answer
    x = 19,359.05

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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.