Home / 21,985.04-30,337.80-12,426.50

Finding the Fourth Proportional to 21,985.04, 30,337.80 and 12,426.50

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Solution

The fourth proportional to 21,985.04, 30,337.80 and 12,426.50 is: 17,147.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.04 : 30,337.80 = 12,426.50 : x
  2. Step 2: Convert to fraction form
    21,985.04/30,337.80 = 12,426.50/x
  3. Step 3: Cross multiply
    21,985.04x = 30,337.80 × 12,426.50
  4. Step 4: Simplify right side
    21,985.04x = 376,992,671.70
  5. Step 5: Solve for x
    x = 376,992,671.70/21,985.04
  6. Step 6: Final answer
    x = 17,147.69

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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.