Home / 30,721.05-42,390.47-17,291.51

Finding the Fourth Proportional to 30,721.05, 42,390.47 and 17,291.51

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Solution

The fourth proportional to 30,721.05, 42,390.47 and 17,291.51 is: 23,859.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,721.05 : 42,390.47 = 17,291.51 : x
  2. Step 2: Convert to fraction form
    30,721.05/42,390.47 = 17,291.51/x
  3. Step 3: Cross multiply
    30,721.05x = 42,390.47 × 17,291.51
  4. Step 4: Simplify right side
    30,721.05x = 732,994,937.50
  5. Step 5: Solve for x
    x = 732,994,937.50/30,721.05
  6. Step 6: Final answer
    x = 23,859.70

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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.