Home / 20,749.98-31,130.75-10,223.07

Finding the Fourth Proportional to 20,749.98, 31,130.75 and 10,223.07

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Solution

The fourth proportional to 20,749.98, 31,130.75 and 10,223.07 is: 15,337.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.98 : 31,130.75 = 10,223.07 : x
  2. Step 2: Convert to fraction form
    20,749.98/31,130.75 = 10,223.07/x
  3. Step 3: Cross multiply
    20,749.98x = 31,130.75 × 10,223.07
  4. Step 4: Simplify right side
    20,749.98x = 318,251,836.40
  5. Step 5: Solve for x
    x = 318,251,836.40/20,749.98
  6. Step 6: Final answer
    x = 15,337.45

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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.