Home / 18,938.61-28,411.56-6,458.13

Finding the Fourth Proportional to 18,938.61, 28,411.56 and 6,458.13

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Solution

The fourth proportional to 18,938.61, 28,411.56 and 6,458.13 is: 9,688.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938.61 : 28,411.56 = 6,458.13 : x
  2. Step 2: Convert to fraction form
    18,938.61/28,411.56 = 6,458.13/x
  3. Step 3: Cross multiply
    18,938.61x = 28,411.56 × 6,458.13
  4. Step 4: Simplify right side
    18,938.61x = 183,485,547.98
  5. Step 5: Solve for x
    x = 183,485,547.98/18,938.61
  6. Step 6: Final answer
    x = 9,688.44

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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.