Home / 30,966.64-42,740.76-20,357.26

Finding the Fourth Proportional to 30,966.64, 42,740.76 and 20,357.26

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Solution

The fourth proportional to 30,966.64, 42,740.76 and 20,357.26 is: 28,097.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,966.64 : 42,740.76 = 20,357.26 : x
  2. Step 2: Convert to fraction form
    30,966.64/42,740.76 = 20,357.26/x
  3. Step 3: Cross multiply
    30,966.64x = 42,740.76 × 20,357.26
  4. Step 4: Simplify right side
    30,966.64x = 870,084,733.41
  5. Step 5: Solve for x
    x = 870,084,733.41/30,966.64
  6. Step 6: Final answer
    x = 28,097.49

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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.