Home / 30,880.20-46,205.10-28,115.40

Finding the Fourth Proportional to 30,880.20, 46,205.10 and 28,115.40

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Solution

The fourth proportional to 30,880.20, 46,205.10 and 28,115.40 is: 42,068.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,880.20 : 46,205.10 = 28,115.40 : x
  2. Step 2: Convert to fraction form
    30,880.20/46,205.10 = 28,115.40/x
  3. Step 3: Cross multiply
    30,880.20x = 46,205.10 × 28,115.40
  4. Step 4: Simplify right side
    30,880.20x = 1,299,074,868.54
  5. Step 5: Solve for x
    x = 1,299,074,868.54/30,880.20
  6. Step 6: Final answer
    x = 42,068.21

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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.