Home / 30,228.80-45,343.20-21,869.60

Finding the Fourth Proportional to 30,228.80, 45,343.20 and 21,869.60

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Solution

The fourth proportional to 30,228.80, 45,343.20 and 21,869.60 is: 32,804.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,228.80 : 45,343.20 = 21,869.60 : x
  2. Step 2: Convert to fraction form
    30,228.80/45,343.20 = 21,869.60/x
  3. Step 3: Cross multiply
    30,228.80x = 45,343.20 × 21,869.60
  4. Step 4: Simplify right side
    30,228.80x = 991,637,646.72
  5. Step 5: Solve for x
    x = 991,637,646.72/30,228.80
  6. Step 6: Final answer
    x = 32,804.40

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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.