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Finding the Fourth Proportional to 25,657.40, 35,407.10 and 14,479.40

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Solution

The fourth proportional to 25,657.40, 35,407.10 and 14,479.40 is: 19,981.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,657.40 : 35,407.10 = 14,479.40 : x
  2. Step 2: Convert to fraction form
    25,657.40/35,407.10 = 14,479.40/x
  3. Step 3: Cross multiply
    25,657.40x = 35,407.10 × 14,479.40
  4. Step 4: Simplify right side
    25,657.40x = 512,673,563.74
  5. Step 5: Solve for x
    x = 512,673,563.74/25,657.40
  6. Step 6: Final answer
    x = 19,981.51

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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.