Home / 30,979.04-42,751.48-16,831.76

Finding the Fourth Proportional to 30,979.04, 42,751.48 and 16,831.76

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Solution

The fourth proportional to 30,979.04, 42,751.48 and 16,831.76 is: 23,228.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.04 : 42,751.48 = 16,831.76 : x
  2. Step 2: Convert to fraction form
    30,979.04/42,751.48 = 16,831.76/x
  3. Step 3: Cross multiply
    30,979.04x = 42,751.48 × 16,831.76
  4. Step 4: Simplify right side
    30,979.04x = 719,582,651.00
  5. Step 5: Solve for x
    x = 719,582,651.00/30,979.04
  6. Step 6: Final answer
    x = 23,228.05

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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.