Home / 10,905.06-15,046.95-6,430.20

Finding the Fourth Proportional to 10,905.06, 15,046.95 and 6,430.20

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Solution

The fourth proportional to 10,905.06, 15,046.95 and 6,430.20 is: 8,872.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.06 : 15,046.95 = 6,430.20 : x
  2. Step 2: Convert to fraction form
    10,905.06/15,046.95 = 6,430.20/x
  3. Step 3: Cross multiply
    10,905.06x = 15,046.95 × 6,430.20
  4. Step 4: Simplify right side
    10,905.06x = 96,754,897.89
  5. Step 5: Solve for x
    x = 96,754,897.89/10,905.06
  6. Step 6: Final answer
    x = 8,872.48

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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.