Home / 18,947.79-28,421.75-8,547.39

Finding the Fourth Proportional to 18,947.79, 28,421.75 and 8,547.39

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Solution

The fourth proportional to 18,947.79, 28,421.75 and 8,547.39 is: 12,821.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.79 : 28,421.75 = 8,547.39 : x
  2. Step 2: Convert to fraction form
    18,947.79/28,421.75 = 8,547.39/x
  3. Step 3: Cross multiply
    18,947.79x = 28,421.75 × 8,547.39
  4. Step 4: Simplify right side
    18,947.79x = 242,931,803.10
  5. Step 5: Solve for x
    x = 242,931,803.10/18,947.79
  6. Step 6: Final answer
    x = 12,821.12

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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.