Home / 28,000.90-42,000.45-9,281.80

Finding the Fourth Proportional to 28,000.90, 42,000.45 and 9,281.80

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Solution

The fourth proportional to 28,000.90, 42,000.45 and 9,281.80 is: 13,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000.90 : 42,000.45 = 9,281.80 : x
  2. Step 2: Convert to fraction form
    28,000.90/42,000.45 = 9,281.80/x
  3. Step 3: Cross multiply
    28,000.90x = 42,000.45 × 9,281.80
  4. Step 4: Simplify right side
    28,000.90x = 389,839,776.81
  5. Step 5: Solve for x
    x = 389,839,776.81/28,000.90
  6. Step 6: Final answer
    x = 13,922.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.