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Finding the Fourth Proportional to 7,920.16, 10,928.16 and 6,031.36

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Solution

The fourth proportional to 7,920.16, 10,928.16 and 6,031.36 is: 8,322.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.16 : 10,928.16 = 6,031.36 : x
  2. Step 2: Convert to fraction form
    7,920.16/10,928.16 = 6,031.36/x
  3. Step 3: Cross multiply
    7,920.16x = 10,928.16 × 6,031.36
  4. Step 4: Simplify right side
    7,920.16x = 65,911,667.10
  5. Step 5: Solve for x
    x = 65,911,667.10/7,920.16
  6. Step 6: Final answer
    x = 8,322.01

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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.