Home / 15,703.63-21,670.21-8,628.69

Finding the Fourth Proportional to 15,703.63, 21,670.21 and 8,628.69

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Solution

The fourth proportional to 15,703.63, 21,670.21 and 8,628.69 is: 11,907.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703.63 : 21,670.21 = 8,628.69 : x
  2. Step 2: Convert to fraction form
    15,703.63/21,670.21 = 8,628.69/x
  3. Step 3: Cross multiply
    15,703.63x = 21,670.21 × 8,628.69
  4. Step 4: Simplify right side
    15,703.63x = 186,985,372.83
  5. Step 5: Solve for x
    x = 186,985,372.83/15,703.63
  6. Step 6: Final answer
    x = 11,907.14

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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.