Home / 30,979.84-42,730.56-20,366.08

Finding the Fourth Proportional to 30,979.84, 42,730.56 and 20,366.08

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Solution

The fourth proportional to 30,979.84, 42,730.56 and 20,366.08 is: 28,090.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.84 : 42,730.56 = 20,366.08 : x
  2. Step 2: Convert to fraction form
    30,979.84/42,730.56 = 20,366.08/x
  3. Step 3: Cross multiply
    30,979.84x = 42,730.56 × 20,366.08
  4. Step 4: Simplify right side
    30,979.84x = 870,254,003.40
  5. Step 5: Solve for x
    x = 870,254,003.40/30,979.84
  6. Step 6: Final answer
    x = 28,090.98

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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.