Home / 15,413.19-21,270.20-8,700.23

Finding the Fourth Proportional to 15,413.19, 21,270.20 and 8,700.23

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Solution

The fourth proportional to 15,413.19, 21,270.20 and 8,700.23 is: 12,006.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,413.19 : 21,270.20 = 8,700.23 : x
  2. Step 2: Convert to fraction form
    15,413.19/21,270.20 = 8,700.23/x
  3. Step 3: Cross multiply
    15,413.19x = 21,270.20 × 8,700.23
  4. Step 4: Simplify right side
    15,413.19x = 185,055,482.29
  5. Step 5: Solve for x
    x = 185,055,482.29/15,413.19
  6. Step 6: Final answer
    x = 12,006.31

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Half scale
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Double scale
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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.