Home / 15,688.80-21,652.32-9,316.80

Finding the Fourth Proportional to 15,688.80, 21,652.32 and 9,316.80

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Solution

The fourth proportional to 15,688.80, 21,652.32 and 9,316.80 is: 12,858.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.80 : 21,652.32 = 9,316.80 : x
  2. Step 2: Convert to fraction form
    15,688.80/21,652.32 = 9,316.80/x
  3. Step 3: Cross multiply
    15,688.80x = 21,652.32 × 9,316.80
  4. Step 4: Simplify right side
    15,688.80x = 201,730,334.98
  5. Step 5: Solve for x
    x = 201,730,334.98/15,688.80
  6. Step 6: Final answer
    x = 12,858.24

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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.