Home / 30,645.28-42,295.10-18,715.60

Finding the Fourth Proportional to 30,645.28, 42,295.10 and 18,715.60

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Solution

The fourth proportional to 30,645.28, 42,295.10 and 18,715.60 is: 25,830.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,645.28 : 42,295.10 = 18,715.60 : x
  2. Step 2: Convert to fraction form
    30,645.28/42,295.10 = 18,715.60/x
  3. Step 3: Cross multiply
    30,645.28x = 42,295.10 × 18,715.60
  4. Step 4: Simplify right side
    30,645.28x = 791,578,173.56
  5. Step 5: Solve for x
    x = 791,578,173.56/30,645.28
  6. Step 6: Final answer
    x = 25,830.35

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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.