Home / 30,641.19-42,300.99-20,622.30

Finding the Fourth Proportional to 30,641.19, 42,300.99 and 20,622.30

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Solution

The fourth proportional to 30,641.19, 42,300.99 and 20,622.30 is: 28,469.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,641.19 : 42,300.99 = 20,622.30 : x
  2. Step 2: Convert to fraction form
    30,641.19/42,300.99 = 20,622.30/x
  3. Step 3: Cross multiply
    30,641.19x = 42,300.99 × 20,622.30
  4. Step 4: Simplify right side
    30,641.19x = 872,343,706.08
  5. Step 5: Solve for x
    x = 872,343,706.08/30,641.19
  6. Step 6: Final answer
    x = 28,469.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.