Home / 12,386.40-18,547.20-9,081.60

Finding the Fourth Proportional to 12,386.40, 18,547.20 and 9,081.60

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Solution

The fourth proportional to 12,386.40, 18,547.20 and 9,081.60 is: 13,598.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.40 : 18,547.20 = 9,081.60 : x
  2. Step 2: Convert to fraction form
    12,386.40/18,547.20 = 9,081.60/x
  3. Step 3: Cross multiply
    12,386.40x = 18,547.20 × 9,081.60
  4. Step 4: Simplify right side
    12,386.40x = 168,438,251.52
  5. Step 5: Solve for x
    x = 168,438,251.52/12,386.40
  6. Step 6: Final answer
    x = 13,598.64

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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.