Home / 13,439.95-18,547.61-7,390.65

Finding the Fourth Proportional to 13,439.95, 18,547.61 and 7,390.65

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Solution

The fourth proportional to 13,439.95, 18,547.61 and 7,390.65 is: 10,199.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.95 : 18,547.61 = 7,390.65 : x
  2. Step 2: Convert to fraction form
    13,439.95/18,547.61 = 7,390.65/x
  3. Step 3: Cross multiply
    13,439.95x = 18,547.61 × 7,390.65
  4. Step 4: Simplify right side
    13,439.95x = 137,078,856.89
  5. Step 5: Solve for x
    x = 137,078,856.89/13,439.95
  6. Step 6: Final answer
    x = 10,199.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.