Home / 10,128.80-14,024.40-9,934.40

Finding the Fourth Proportional to 10,128.80, 14,024.40 and 9,934.40

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Solution

The fourth proportional to 10,128.80, 14,024.40 and 9,934.40 is: 13,755.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.80 : 14,024.40 = 9,934.40 : x
  2. Step 2: Convert to fraction form
    10,128.80/14,024.40 = 9,934.40/x
  3. Step 3: Cross multiply
    10,128.80x = 14,024.40 × 9,934.40
  4. Step 4: Simplify right side
    10,128.80x = 139,323,999.36
  5. Step 5: Solve for x
    x = 139,323,999.36/10,128.80
  6. Step 6: Final answer
    x = 13,755.23

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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.