Home / 28,005.14-42,014.87-9,290.40

Finding the Fourth Proportional to 28,005.14, 42,014.87 and 9,290.40

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Solution

The fourth proportional to 28,005.14, 42,014.87 and 9,290.40 is: 13,937.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.14 : 42,014.87 = 9,290.40 : x
  2. Step 2: Convert to fraction form
    28,005.14/42,014.87 = 9,290.40/x
  3. Step 3: Cross multiply
    28,005.14x = 42,014.87 × 9,290.40
  4. Step 4: Simplify right side
    28,005.14x = 390,334,948.25
  5. Step 5: Solve for x
    x = 390,334,948.25/28,005.14
  6. Step 6: Final answer
    x = 13,937.98

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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.