Home / 15,784.48-21,782.16-8,710.72

Finding the Fourth Proportional to 15,784.48, 21,782.16 and 8,710.72

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Solution

The fourth proportional to 15,784.48, 21,782.16 and 8,710.72 is: 12,020.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,784.48 : 21,782.16 = 8,710.72 : x
  2. Step 2: Convert to fraction form
    15,784.48/21,782.16 = 8,710.72/x
  3. Step 3: Cross multiply
    15,784.48x = 21,782.16 × 8,710.72
  4. Step 4: Simplify right side
    15,784.48x = 189,738,296.76
  5. Step 5: Solve for x
    x = 189,738,296.76/15,784.48
  6. Step 6: Final answer
    x = 12,020.56

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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.