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Finding the Fourth Proportional to 35,431, 48,894.78 and 19,515.40

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Solution

The fourth proportional to 35,431, 48,894.78 and 19,515.40 is: 26,931.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,431 : 48,894.78 = 19,515.40 : x
  2. Step 2: Convert to fraction form
    35,431/48,894.78 = 19,515.40/x
  3. Step 3: Cross multiply
    35,431x = 48,894.78 × 19,515.40
  4. Step 4: Simplify right side
    35,431x = 954,201,189.61
  5. Step 5: Solve for x
    x = 954,201,189.61/35,431
  6. Step 6: Final answer
    x = 26,931.25

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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.