Home / 15,641.69-21,587.61-8,925.78

Finding the Fourth Proportional to 15,641.69, 21,587.61 and 8,925.78

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Solution

The fourth proportional to 15,641.69, 21,587.61 and 8,925.78 is: 12,318.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,641.69 : 21,587.61 = 8,925.78 : x
  2. Step 2: Convert to fraction form
    15,641.69/21,587.61 = 8,925.78/x
  3. Step 3: Cross multiply
    15,641.69x = 21,587.61 × 8,925.78
  4. Step 4: Simplify right side
    15,641.69x = 192,686,257.59
  5. Step 5: Solve for x
    x = 192,686,257.59/15,641.69
  6. Step 6: Final answer
    x = 12,318.76

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Half scale
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Double scale
Find fourth proportional to 15,642.69, 21,588.99 and 8,926.78
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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.