Home / 10,639.48-14,668.75-8,718.15

Finding the Fourth Proportional to 10,639.48, 14,668.75 and 8,718.15

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Solution

The fourth proportional to 10,639.48, 14,668.75 and 8,718.15 is: 12,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.48 : 14,668.75 = 8,718.15 : x
  2. Step 2: Convert to fraction form
    10,639.48/14,668.75 = 8,718.15/x
  3. Step 3: Cross multiply
    10,639.48x = 14,668.75 × 8,718.15
  4. Step 4: Simplify right side
    10,639.48x = 127,884,384.61
  5. Step 5: Solve for x
    x = 127,884,384.61/10,639.48
  6. Step 6: Final answer
    x = 12,019.80

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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.