Home / 30,864.04-42,563.12-21,288.62

Finding the Fourth Proportional to 30,864.04, 42,563.12 and 21,288.62

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Solution

The fourth proportional to 30,864.04, 42,563.12 and 21,288.62 is: 29,358.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,864.04 : 42,563.12 = 21,288.62 : x
  2. Step 2: Convert to fraction form
    30,864.04/42,563.12 = 21,288.62/x
  3. Step 3: Cross multiply
    30,864.04x = 42,563.12 × 21,288.62
  4. Step 4: Simplify right side
    30,864.04x = 906,110,207.41
  5. Step 5: Solve for x
    x = 906,110,207.41/30,864.04
  6. Step 6: Final answer
    x = 29,358.12

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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.