Home / 30,456.40-42,050.64-19,727.20

Finding the Fourth Proportional to 30,456.40, 42,050.64 and 19,727.20

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Solution

The fourth proportional to 30,456.40, 42,050.64 and 19,727.20 is: 27,237.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,456.40 : 42,050.64 = 19,727.20 : x
  2. Step 2: Convert to fraction form
    30,456.40/42,050.64 = 19,727.20/x
  3. Step 3: Cross multiply
    30,456.40x = 42,050.64 × 19,727.20
  4. Step 4: Simplify right side
    30,456.40x = 829,541,385.41
  5. Step 5: Solve for x
    x = 829,541,385.41/30,456.40
  6. Step 6: Final answer
    x = 27,237.01

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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.