Home / 14,087.79-21,129.12-5,319.81

Finding the Fourth Proportional to 14,087.79, 21,129.12 and 5,319.81

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Solution

The fourth proportional to 14,087.79, 21,129.12 and 5,319.81 is: 7,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,087.79 : 21,129.12 = 5,319.81 : x
  2. Step 2: Convert to fraction form
    14,087.79/21,129.12 = 5,319.81/x
  3. Step 3: Cross multiply
    14,087.79x = 21,129.12 × 5,319.81
  4. Step 4: Simplify right side
    14,087.79x = 112,402,903.87
  5. Step 5: Solve for x
    x = 112,402,903.87/14,087.79
  6. Step 6: Final answer
    x = 7,978.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.