Home / 15,681.16-21,639.60-8,607.52

Finding the Fourth Proportional to 15,681.16, 21,639.60 and 8,607.52

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Solution

The fourth proportional to 15,681.16, 21,639.60 and 8,607.52 is: 11,878.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.16 : 21,639.60 = 8,607.52 : x
  2. Step 2: Convert to fraction form
    15,681.16/21,639.60 = 8,607.52/x
  3. Step 3: Cross multiply
    15,681.16x = 21,639.60 × 8,607.52
  4. Step 4: Simplify right side
    15,681.16x = 186,263,289.79
  5. Step 5: Solve for x
    x = 186,263,289.79/15,681.16
  6. Step 6: Final answer
    x = 11,878.16

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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.