Home / 15,688.10-21,651.36-9,316.64

Finding the Fourth Proportional to 15,688.10, 21,651.36 and 9,316.64

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Solution

The fourth proportional to 15,688.10, 21,651.36 and 9,316.64 is: 12,858.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.10 : 21,651.36 = 9,316.64 : x
  2. Step 2: Convert to fraction form
    15,688.10/21,651.36 = 9,316.64/x
  3. Step 3: Cross multiply
    15,688.10x = 21,651.36 × 9,316.64
  4. Step 4: Simplify right side
    15,688.10x = 201,717,926.63
  5. Step 5: Solve for x
    x = 201,717,926.63/15,688.10
  6. Step 6: Final answer
    x = 12,858.02

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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.