Home / 15,271.79-21,074.90-8,557.47

Finding the Fourth Proportional to 15,271.79, 21,074.90 and 8,557.47

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Solution

The fourth proportional to 15,271.79, 21,074.90 and 8,557.47 is: 11,809.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,271.79 : 21,074.90 = 8,557.47 : x
  2. Step 2: Convert to fraction form
    15,271.79/21,074.90 = 8,557.47/x
  3. Step 3: Cross multiply
    15,271.79x = 21,074.90 × 8,557.47
  4. Step 4: Simplify right side
    15,271.79x = 180,347,781.72
  5. Step 5: Solve for x
    x = 180,347,781.72/15,271.79
  6. Step 6: Final answer
    x = 11,809.21

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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.