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Finding the Fourth Proportional to 25,955.64, 38,926.98 and 8,430.48

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Solution

The fourth proportional to 25,955.64, 38,926.98 and 8,430.48 is: 12,643.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,955.64 : 38,926.98 = 8,430.48 : x
  2. Step 2: Convert to fraction form
    25,955.64/38,926.98 = 8,430.48/x
  3. Step 3: Cross multiply
    25,955.64x = 38,926.98 × 8,430.48
  4. Step 4: Simplify right side
    25,955.64x = 328,173,126.35
  5. Step 5: Solve for x
    x = 328,173,126.35/25,955.64
  6. Step 6: Final answer
    x = 12,643.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.