Home / 28,929.40-43,385.50-12,289.28

Finding the Fourth Proportional to 28,929.40, 43,385.50 and 12,289.28

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Solution

The fourth proportional to 28,929.40, 43,385.50 and 12,289.28 is: 18,430.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,929.40 : 43,385.50 = 12,289.28 : x
  2. Step 2: Convert to fraction form
    28,929.40/43,385.50 = 12,289.28/x
  3. Step 3: Cross multiply
    28,929.40x = 43,385.50 × 12,289.28
  4. Step 4: Simplify right side
    28,929.40x = 533,176,557.44
  5. Step 5: Solve for x
    x = 533,176,557.44/28,929.40
  6. Step 6: Final answer
    x = 18,430.27

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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.