Home / 15,776.09-21,771.01-8,702.51

Finding the Fourth Proportional to 15,776.09, 21,771.01 and 8,702.51

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Solution

The fourth proportional to 15,776.09, 21,771.01 and 8,702.51 is: 12,009.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.09 : 21,771.01 = 8,702.51 : x
  2. Step 2: Convert to fraction form
    15,776.09/21,771.01 = 8,702.51/x
  3. Step 3: Cross multiply
    15,776.09x = 21,771.01 × 8,702.51
  4. Step 4: Simplify right side
    15,776.09x = 189,462,464.91
  5. Step 5: Solve for x
    x = 189,462,464.91/15,776.09
  6. Step 6: Final answer
    x = 12,009.47

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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.