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Finding the Fourth Proportional to 6,512.70, 8,987.40 and 3,528.51

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Solution

The fourth proportional to 6,512.70, 8,987.40 and 3,528.51 is: 4,869.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,512.70 : 8,987.40 = 3,528.51 : x
  2. Step 2: Convert to fraction form
    6,512.70/8,987.40 = 3,528.51/x
  3. Step 3: Cross multiply
    6,512.70x = 8,987.40 × 3,528.51
  4. Step 4: Simplify right side
    6,512.70x = 31,712,130.77
  5. Step 5: Solve for x
    x = 31,712,130.77/6,512.70
  6. Step 6: Final answer
    x = 4,869.28

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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.