Home / 28,428.81-42,643.32-8,707.28

Finding the Fourth Proportional to 28,428.81, 42,643.32 and 8,707.28

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Solution

The fourth proportional to 28,428.81, 42,643.32 and 8,707.28 is: 13,060.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.81 : 42,643.32 = 8,707.28 : x
  2. Step 2: Convert to fraction form
    28,428.81/42,643.32 = 8,707.28/x
  3. Step 3: Cross multiply
    28,428.81x = 42,643.32 × 8,707.28
  4. Step 4: Simplify right side
    28,428.81x = 371,307,327.37
  5. Step 5: Solve for x
    x = 371,307,327.37/28,428.81
  6. Step 6: Final answer
    x = 13,060.95

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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.