Home / 8,970.31-12,377.55-4,991.32

Finding the Fourth Proportional to 8,970.31, 12,377.55 and 4,991.32

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Solution

The fourth proportional to 8,970.31, 12,377.55 and 4,991.32 is: 6,887.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.31 : 12,377.55 = 4,991.32 : x
  2. Step 2: Convert to fraction form
    8,970.31/12,377.55 = 4,991.32/x
  3. Step 3: Cross multiply
    8,970.31x = 12,377.55 × 4,991.32
  4. Step 4: Simplify right side
    8,970.31x = 61,780,312.87
  5. Step 5: Solve for x
    x = 61,780,312.87/8,970.31
  6. Step 6: Final answer
    x = 6,887.20

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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.