Home / 30,215.40-45,323.10-18,535.20

Finding the Fourth Proportional to 30,215.40, 45,323.10 and 18,535.20

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Solution

The fourth proportional to 30,215.40, 45,323.10 and 18,535.20 is: 27,802.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,215.40 : 45,323.10 = 18,535.20 : x
  2. Step 2: Convert to fraction form
    30,215.40/45,323.10 = 18,535.20/x
  3. Step 3: Cross multiply
    30,215.40x = 45,323.10 × 18,535.20
  4. Step 4: Simplify right side
    30,215.40x = 840,072,723.12
  5. Step 5: Solve for x
    x = 840,072,723.12/30,215.40
  6. Step 6: Final answer
    x = 27,802.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.