Home / 30,970.84-42,750.68-18,395.52

Finding the Fourth Proportional to 30,970.84, 42,750.68 and 18,395.52

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Solution

The fourth proportional to 30,970.84, 42,750.68 and 18,395.52 is: 25,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,970.84 : 42,750.68 = 18,395.52 : x
  2. Step 2: Convert to fraction form
    30,970.84/42,750.68 = 18,395.52/x
  3. Step 3: Cross multiply
    30,970.84x = 42,750.68 × 18,395.52
  4. Step 4: Simplify right side
    30,970.84x = 786,420,988.95
  5. Step 5: Solve for x
    x = 786,420,988.95/30,970.84
  6. Step 6: Final answer
    x = 25,392.30

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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.