Home / 30,641.07-42,300.80-20,622.18

Finding the Fourth Proportional to 30,641.07, 42,300.80 and 20,622.18

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Solution

The fourth proportional to 30,641.07, 42,300.80 and 20,622.18 is: 28,469.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,641.07 : 42,300.80 = 20,622.18 : x
  2. Step 2: Convert to fraction form
    30,641.07/42,300.80 = 20,622.18/x
  3. Step 3: Cross multiply
    30,641.07x = 42,300.80 × 20,622.18
  4. Step 4: Simplify right side
    30,641.07x = 872,334,711.74
  5. Step 5: Solve for x
    x = 872,334,711.74/30,641.07
  6. Step 6: Final answer
    x = 28,469.46

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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.