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Finding the Fourth Proportional to 28,030.41, 42,045.78 and 8,309.13

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Solution

The fourth proportional to 28,030.41, 42,045.78 and 8,309.13 is: 12,463.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,030.41 : 42,045.78 = 8,309.13 : x
  2. Step 2: Convert to fraction form
    28,030.41/42,045.78 = 8,309.13/x
  3. Step 3: Cross multiply
    28,030.41x = 42,045.78 × 8,309.13
  4. Step 4: Simplify right side
    28,030.41x = 349,363,810.43
  5. Step 5: Solve for x
    x = 349,363,810.43/28,030.41
  6. Step 6: Final answer
    x = 12,463.74

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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.