Home / 20,750.96-31,130.76-7,603.76

Finding the Fourth Proportional to 20,750.96, 31,130.76 and 7,603.76

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Solution

The fourth proportional to 20,750.96, 31,130.76 and 7,603.76 is: 11,407.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.96 : 31,130.76 = 7,603.76 : x
  2. Step 2: Convert to fraction form
    20,750.96/31,130.76 = 7,603.76/x
  3. Step 3: Cross multiply
    20,750.96x = 31,130.76 × 7,603.76
  4. Step 4: Simplify right side
    20,750.96x = 236,710,827.66
  5. Step 5: Solve for x
    x = 236,710,827.66/20,750.96
  6. Step 6: Final answer
    x = 11,407.22

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1.5x scale

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.