Home / 10,903.77-15,043.29-7,129.10

Finding the Fourth Proportional to 10,903.77, 15,043.29 and 7,129.10

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Solution

The fourth proportional to 10,903.77, 15,043.29 and 7,129.10 is: 9,835.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,903.77 : 15,043.29 = 7,129.10 : x
  2. Step 2: Convert to fraction form
    10,903.77/15,043.29 = 7,129.10/x
  3. Step 3: Cross multiply
    10,903.77x = 15,043.29 × 7,129.10
  4. Step 4: Simplify right side
    10,903.77x = 107,245,043.52
  5. Step 5: Solve for x
    x = 107,245,043.52/10,903.77
  6. Step 6: Final answer
    x = 9,835.59

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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.