Home / 30,679.21-42,349.22-19,346.32

Finding the Fourth Proportional to 30,679.21, 42,349.22 and 19,346.32

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Solution

The fourth proportional to 30,679.21, 42,349.22 and 19,346.32 is: 26,705.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,679.21 : 42,349.22 = 19,346.32 : x
  2. Step 2: Convert to fraction form
    30,679.21/42,349.22 = 19,346.32/x
  3. Step 3: Cross multiply
    30,679.21x = 42,349.22 × 19,346.32
  4. Step 4: Simplify right side
    30,679.21x = 819,301,561.87
  5. Step 5: Solve for x
    x = 819,301,561.87/30,679.21
  6. Step 6: Final answer
    x = 26,705.43

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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.