Home / 30,979.02-42,750.54-16,831.56

Finding the Fourth Proportional to 30,979.02, 42,750.54 and 16,831.56

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Solution

The fourth proportional to 30,979.02, 42,750.54 and 16,831.56 is: 23,227.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.02 : 42,750.54 = 16,831.56 : x
  2. Step 2: Convert to fraction form
    30,979.02/42,750.54 = 16,831.56/x
  3. Step 3: Cross multiply
    30,979.02x = 42,750.54 × 16,831.56
  4. Step 4: Simplify right side
    30,979.02x = 719,558,279.04
  5. Step 5: Solve for x
    x = 719,558,279.04/30,979.02
  6. Step 6: Final answer
    x = 23,227.28

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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.