Home / 34,128.70-47,126.70-21,403.30

Finding the Fourth Proportional to 34,128.70, 47,126.70 and 21,403.30

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Solution

The fourth proportional to 34,128.70, 47,126.70 and 21,403.30 is: 29,554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,128.70 : 47,126.70 = 21,403.30 : x
  2. Step 2: Convert to fraction form
    34,128.70/47,126.70 = 21,403.30/x
  3. Step 3: Cross multiply
    34,128.70x = 47,126.70 × 21,403.30
  4. Step 4: Simplify right side
    34,128.70x = 1,008,666,898.11
  5. Step 5: Solve for x
    x = 1,008,666,898.11/34,128.70
  6. Step 6: Final answer
    x = 29,554.80

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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.