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Finding the Fourth Proportional to 28,541.40, 42,812.10 and 19,210.20

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Solution

The fourth proportional to 28,541.40, 42,812.10 and 19,210.20 is: 28,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,541.40 : 42,812.10 = 19,210.20 : x
  2. Step 2: Convert to fraction form
    28,541.40/42,812.10 = 19,210.20/x
  3. Step 3: Cross multiply
    28,541.40x = 42,812.10 × 19,210.20
  4. Step 4: Simplify right side
    28,541.40x = 822,429,003.42
  5. Step 5: Solve for x
    x = 822,429,003.42/28,541.40
  6. Step 6: Final answer
    x = 28,815.30

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Similar ratio
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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.