Home / 13,999.76-19,319.80-7,712.28

Finding the Fourth Proportional to 13,999.76, 19,319.80 and 7,712.28

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Solution

The fourth proportional to 13,999.76, 19,319.80 and 7,712.28 is: 10,643.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.76 : 19,319.80 = 7,712.28 : x
  2. Step 2: Convert to fraction form
    13,999.76/19,319.80 = 7,712.28/x
  3. Step 3: Cross multiply
    13,999.76x = 19,319.80 × 7,712.28
  4. Step 4: Simplify right side
    13,999.76x = 148,999,707.14
  5. Step 5: Solve for x
    x = 148,999,707.14/13,999.76
  6. Step 6: Final answer
    x = 10,643.02

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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.