Home / 28,428.16-42,643.52-8,705.28

Finding the Fourth Proportional to 28,428.16, 42,643.52 and 8,705.28

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Solution

The fourth proportional to 28,428.16, 42,643.52 and 8,705.28 is: 13,058.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.16 : 42,643.52 = 8,705.28 : x
  2. Step 2: Convert to fraction form
    28,428.16/42,643.52 = 8,705.28/x
  3. Step 3: Cross multiply
    28,428.16x = 42,643.52 × 8,705.28
  4. Step 4: Simplify right side
    28,428.16x = 371,223,781.79
  5. Step 5: Solve for x
    x = 371,223,781.79/28,428.16
  6. Step 6: Final answer
    x = 13,058.31

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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.