Home / 8,905.19-12,290.08-5,128.50

Finding the Fourth Proportional to 8,905.19, 12,290.08 and 5,128.50

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Solution

The fourth proportional to 8,905.19, 12,290.08 and 5,128.50 is: 7,077.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.19 : 12,290.08 = 5,128.50 : x
  2. Step 2: Convert to fraction form
    8,905.19/12,290.08 = 5,128.50/x
  3. Step 3: Cross multiply
    8,905.19x = 12,290.08 × 5,128.50
  4. Step 4: Simplify right side
    8,905.19x = 63,029,675.28
  5. Step 5: Solve for x
    x = 63,029,675.28/8,905.19
  6. Step 6: Final answer
    x = 7,077.86

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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.