Home / 30,547.86-45,789.81-12,788.70

Finding the Fourth Proportional to 30,547.86, 45,789.81 and 12,788.70

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Solution

The fourth proportional to 30,547.86, 45,789.81 and 12,788.70 is: 19,169.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,547.86 : 45,789.81 = 12,788.70 : x
  2. Step 2: Convert to fraction form
    30,547.86/45,789.81 = 12,788.70/x
  3. Step 3: Cross multiply
    30,547.86x = 45,789.81 × 12,788.70
  4. Step 4: Simplify right side
    30,547.86x = 585,592,143.15
  5. Step 5: Solve for x
    x = 585,592,143.15/30,547.86
  6. Step 6: Final answer
    x = 19,169.66

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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.