Home / 7,864.40-10,856.28-5,207.12

Finding the Fourth Proportional to 7,864.40, 10,856.28 and 5,207.12

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Solution

The fourth proportional to 7,864.40, 10,856.28 and 5,207.12 is: 7,188.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,864.40 : 10,856.28 = 5,207.12 : x
  2. Step 2: Convert to fraction form
    7,864.40/10,856.28 = 5,207.12/x
  3. Step 3: Cross multiply
    7,864.40x = 10,856.28 × 5,207.12
  4. Step 4: Simplify right side
    7,864.40x = 56,529,952.71
  5. Step 5: Solve for x
    x = 56,529,952.71/7,864.40
  6. Step 6: Final answer
    x = 7,188.08

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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.