Home / 13,999.48-19,319.70-7,711.72

Finding the Fourth Proportional to 13,999.48, 19,319.70 and 7,711.72

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Solution

The fourth proportional to 13,999.48, 19,319.70 and 7,711.72 is: 10,642.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.48 : 19,319.70 = 7,711.72 : x
  2. Step 2: Convert to fraction form
    13,999.48/19,319.70 = 7,711.72/x
  3. Step 3: Cross multiply
    13,999.48x = 19,319.70 × 7,711.72
  4. Step 4: Simplify right side
    13,999.48x = 148,988,116.88
  5. Step 5: Solve for x
    x = 148,988,116.88/13,999.48
  6. Step 6: Final answer
    x = 10,642.40

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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.