Home / 15,485.77-21,368.37-9,115.93

Finding the Fourth Proportional to 15,485.77, 21,368.37 and 9,115.93

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Solution

The fourth proportional to 15,485.77, 21,368.37 and 9,115.93 is: 12,578.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.77 : 21,368.37 = 9,115.93 : x
  2. Step 2: Convert to fraction form
    15,485.77/21,368.37 = 9,115.93/x
  3. Step 3: Cross multiply
    15,485.77x = 21,368.37 × 9,115.93
  4. Step 4: Simplify right side
    15,485.77x = 194,792,565.13
  5. Step 5: Solve for x
    x = 194,792,565.13/15,485.77
  6. Step 6: Final answer
    x = 12,578.81

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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.