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Finding the Fourth Proportional to 12,976.61, 19,464.91 and 7,426.08

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Solution

The fourth proportional to 12,976.61, 19,464.91 and 7,426.08 is: 11,139.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,976.61 : 19,464.91 = 7,426.08 : x
  2. Step 2: Convert to fraction form
    12,976.61/19,464.91 = 7,426.08/x
  3. Step 3: Cross multiply
    12,976.61x = 19,464.91 × 7,426.08
  4. Step 4: Simplify right side
    12,976.61x = 144,547,960.29
  5. Step 5: Solve for x
    x = 144,547,960.29/12,976.61
  6. Step 6: Final answer
    x = 11,139.12

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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.