Home / 7,920.86-10,931.56-4,776.98

Finding the Fourth Proportional to 7,920.86, 10,931.56 and 4,776.98

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Solution

The fourth proportional to 7,920.86, 10,931.56 and 4,776.98 is: 6,592.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.86 : 10,931.56 = 4,776.98 : x
  2. Step 2: Convert to fraction form
    7,920.86/10,931.56 = 4,776.98/x
  3. Step 3: Cross multiply
    7,920.86x = 10,931.56 × 4,776.98
  4. Step 4: Simplify right side
    7,920.86x = 52,219,843.49
  5. Step 5: Solve for x
    x = 52,219,843.49/7,920.86
  6. Step 6: Final answer
    x = 6,592.70

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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.