Home / 15,345.08-21,153.64-10,855

Finding the Fourth Proportional to 15,345.08, 21,153.64 and 10,855

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Solution

The fourth proportional to 15,345.08, 21,153.64 and 10,855 is: 14,963.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.08 : 21,153.64 = 10,855 : x
  2. Step 2: Convert to fraction form
    15,345.08/21,153.64 = 10,855/x
  3. Step 3: Cross multiply
    15,345.08x = 21,153.64 × 10,855
  4. Step 4: Simplify right side
    15,345.08x = 229,622,762.20
  5. Step 5: Solve for x
    x = 229,622,762.20/15,345.08
  6. Step 6: Final answer
    x = 14,963.93

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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.