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Finding the Fourth Proportional to 30,948.84, 42,687.54 and 19,018.89

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Solution

The fourth proportional to 30,948.84, 42,687.54 and 19,018.89 is: 26,232.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,948.84 : 42,687.54 = 19,018.89 : x
  2. Step 2: Convert to fraction form
    30,948.84/42,687.54 = 19,018.89/x
  3. Step 3: Cross multiply
    30,948.84x = 42,687.54 × 19,018.89
  4. Step 4: Simplify right side
    30,948.84x = 811,869,627.63
  5. Step 5: Solve for x
    x = 811,869,627.63/30,948.84
  6. Step 6: Final answer
    x = 26,232.64

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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.