Home / 15,266.16-21,066.72-8,978.40

Finding the Fourth Proportional to 15,266.16, 21,066.72 and 8,978.40

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Solution

The fourth proportional to 15,266.16, 21,066.72 and 8,978.40 is: 12,389.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,266.16 : 21,066.72 = 8,978.40 : x
  2. Step 2: Convert to fraction form
    15,266.16/21,066.72 = 8,978.40/x
  3. Step 3: Cross multiply
    15,266.16x = 21,066.72 × 8,978.40
  4. Step 4: Simplify right side
    15,266.16x = 189,145,438.85
  5. Step 5: Solve for x
    x = 189,145,438.85/15,266.16
  6. Step 6: Final answer
    x = 12,389.85

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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.