Home / 30,864.40-42,592.80-16,717.28

Finding the Fourth Proportional to 30,864.40, 42,592.80 and 16,717.28

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Solution

The fourth proportional to 30,864.40, 42,592.80 and 16,717.28 is: 23,069.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,864.40 : 42,592.80 = 16,717.28 : x
  2. Step 2: Convert to fraction form
    30,864.40/42,592.80 = 16,717.28/x
  3. Step 3: Cross multiply
    30,864.40x = 42,592.80 × 16,717.28
  4. Step 4: Simplify right side
    30,864.40x = 712,035,763.58
  5. Step 5: Solve for x
    x = 712,035,763.58/30,864.40
  6. Step 6: Final answer
    x = 23,069.81

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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.