Home / 15,319.06-21,138.81-8,603.16

Finding the Fourth Proportional to 15,319.06, 21,138.81 and 8,603.16

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Solution

The fourth proportional to 15,319.06, 21,138.81 and 8,603.16 is: 11,871.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.06 : 21,138.81 = 8,603.16 : x
  2. Step 2: Convert to fraction form
    15,319.06/21,138.81 = 8,603.16/x
  3. Step 3: Cross multiply
    15,319.06x = 21,138.81 × 8,603.16
  4. Step 4: Simplify right side
    15,319.06x = 181,860,564.64
  5. Step 5: Solve for x
    x = 181,860,564.64/15,319.06
  6. Step 6: Final answer
    x = 11,871.52

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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.