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Finding the Fourth Proportional to 8,570.79, 11,822.63 and 5,210.91

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Solution

The fourth proportional to 8,570.79, 11,822.63 and 5,210.91 is: 7,187.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,570.79 : 11,822.63 = 5,210.91 : x
  2. Step 2: Convert to fraction form
    8,570.79/11,822.63 = 5,210.91/x
  3. Step 3: Cross multiply
    8,570.79x = 11,822.63 × 5,210.91
  4. Step 4: Simplify right side
    8,570.79x = 61,606,634.84
  5. Step 5: Solve for x
    x = 61,606,634.84/8,570.79
  6. Step 6: Final answer
    x = 7,187.98

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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.