Home / 30,428.28-42,020.01-28,771.74

Finding the Fourth Proportional to 30,428.28, 42,020.01 and 28,771.74

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Solution

The fourth proportional to 30,428.28, 42,020.01 and 28,771.74 is: 39,732.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,428.28 : 42,020.01 = 28,771.74 : x
  2. Step 2: Convert to fraction form
    30,428.28/42,020.01 = 28,771.74/x
  3. Step 3: Cross multiply
    30,428.28x = 42,020.01 × 28,771.74
  4. Step 4: Simplify right side
    30,428.28x = 1,208,988,802.52
  5. Step 5: Solve for x
    x = 1,208,988,802.52/30,428.28
  6. Step 6: Final answer
    x = 39,732.41

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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.