Home / 15,330.63-21,155.53-8,957.55

Finding the Fourth Proportional to 15,330.63, 21,155.53 and 8,957.55

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Solution

The fourth proportional to 15,330.63, 21,155.53 and 8,957.55 is: 12,360.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.63 : 21,155.53 = 8,957.55 : x
  2. Step 2: Convert to fraction form
    15,330.63/21,155.53 = 8,957.55/x
  3. Step 3: Cross multiply
    15,330.63x = 21,155.53 × 8,957.55
  4. Step 4: Simplify right side
    15,330.63x = 189,501,717.75
  5. Step 5: Solve for x
    x = 189,501,717.75/15,330.63
  6. Step 6: Final answer
    x = 12,360.99

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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.