Home / 19,111.40-28,667.10-9,780.20

Finding the Fourth Proportional to 19,111.40, 28,667.10 and 9,780.20

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Solution

The fourth proportional to 19,111.40, 28,667.10 and 9,780.20 is: 14,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,111.40 : 28,667.10 = 9,780.20 : x
  2. Step 2: Convert to fraction form
    19,111.40/28,667.10 = 9,780.20/x
  3. Step 3: Cross multiply
    19,111.40x = 28,667.10 × 9,780.20
  4. Step 4: Simplify right side
    19,111.40x = 280,369,971.42
  5. Step 5: Solve for x
    x = 280,369,971.42/19,111.40
  6. Step 6: Final answer
    x = 14,670.30

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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.