Home / 15,686.10-21,648.60-9,314.64

Finding the Fourth Proportional to 15,686.10, 21,648.60 and 9,314.64

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Solution

The fourth proportional to 15,686.10, 21,648.60 and 9,314.64 is: 12,855.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.10 : 21,648.60 = 9,314.64 : x
  2. Step 2: Convert to fraction form
    15,686.10/21,648.60 = 9,314.64/x
  3. Step 3: Cross multiply
    15,686.10x = 21,648.60 × 9,314.64
  4. Step 4: Simplify right side
    15,686.10x = 201,648,915.50
  5. Step 5: Solve for x
    x = 201,648,915.50/15,686.10
  6. Step 6: Final answer
    x = 12,855.26

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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.