Home / 10,139.86-13,999.60-9,075.80

Finding the Fourth Proportional to 10,139.86, 13,999.60 and 9,075.80

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Solution

The fourth proportional to 10,139.86, 13,999.60 and 9,075.80 is: 12,530.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.86 : 13,999.60 = 9,075.80 : x
  2. Step 2: Convert to fraction form
    10,139.86/13,999.60 = 9,075.80/x
  3. Step 3: Cross multiply
    10,139.86x = 13,999.60 × 9,075.80
  4. Step 4: Simplify right side
    10,139.86x = 127,057,569.68
  5. Step 5: Solve for x
    x = 127,057,569.68/10,139.86
  6. Step 6: Final answer
    x = 12,530.51

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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.