Home / 30,282.45-45,447.47-20,987.81

Finding the Fourth Proportional to 30,282.45, 45,447.47 and 20,987.81

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Solution

The fourth proportional to 30,282.45, 45,447.47 and 20,987.81 is: 31,498.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,282.45 : 45,447.47 = 20,987.81 : x
  2. Step 2: Convert to fraction form
    30,282.45/45,447.47 = 20,987.81/x
  3. Step 3: Cross multiply
    30,282.45x = 45,447.47 × 20,987.81
  4. Step 4: Simplify right side
    30,282.45x = 953,842,865.34
  5. Step 5: Solve for x
    x = 953,842,865.34/30,282.45
  6. Step 6: Final answer
    x = 31,498.21

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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.