Home / 15,289.70-21,104.16-9,005.72

Finding the Fourth Proportional to 15,289.70, 21,104.16 and 9,005.72

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Solution

The fourth proportional to 15,289.70, 21,104.16 and 9,005.72 is: 12,430.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.70 : 21,104.16 = 9,005.72 : x
  2. Step 2: Convert to fraction form
    15,289.70/21,104.16 = 9,005.72/x
  3. Step 3: Cross multiply
    15,289.70x = 21,104.16 × 9,005.72
  4. Step 4: Simplify right side
    15,289.70x = 190,058,155.80
  5. Step 5: Solve for x
    x = 190,058,155.80/15,289.70
  6. Step 6: Final answer
    x = 12,430.47

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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.