Home / 30,720.51-42,378.82-17,965.34

Finding the Fourth Proportional to 30,720.51, 42,378.82 and 17,965.34

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Solution

The fourth proportional to 30,720.51, 42,378.82 and 17,965.34 is: 24,783.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.51 : 42,378.82 = 17,965.34 : x
  2. Step 2: Convert to fraction form
    30,720.51/42,378.82 = 17,965.34/x
  3. Step 3: Cross multiply
    30,720.51x = 42,378.82 × 17,965.34
  4. Step 4: Simplify right side
    30,720.51x = 761,349,910.10
  5. Step 5: Solve for x
    x = 761,349,910.10/30,720.51
  6. Step 6: Final answer
    x = 24,783.11

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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.