Home / 15,312.42-21,129.50-8,598.78

Finding the Fourth Proportional to 15,312.42, 21,129.50 and 8,598.78

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Solution

The fourth proportional to 15,312.42, 21,129.50 and 8,598.78 is: 11,865.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.42 : 21,129.50 = 8,598.78 : x
  2. Step 2: Convert to fraction form
    15,312.42/21,129.50 = 8,598.78/x
  3. Step 3: Cross multiply
    15,312.42x = 21,129.50 × 8,598.78
  4. Step 4: Simplify right side
    15,312.42x = 181,687,922.01
  5. Step 5: Solve for x
    x = 181,687,922.01/15,312.42
  6. Step 6: Final answer
    x = 11,865.40

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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.