Home / 30,970.19-42,738.67-16,822.91

Finding the Fourth Proportional to 30,970.19, 42,738.67 and 16,822.91

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Solution

The fourth proportional to 30,970.19, 42,738.67 and 16,822.91 is: 23,215.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,970.19 : 42,738.67 = 16,822.91 : x
  2. Step 2: Convert to fraction form
    30,970.19/42,738.67 = 16,822.91/x
  3. Step 3: Cross multiply
    30,970.19x = 42,738.67 × 16,822.91
  4. Step 4: Simplify right side
    30,970.19x = 718,988,798.93
  5. Step 5: Solve for x
    x = 718,988,798.93/30,970.19
  6. Step 6: Final answer
    x = 23,215.51

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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.