Home / 21,280.36-29,368.18-12,330.68

Finding the Fourth Proportional to 21,280.36, 29,368.18 and 12,330.68

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Solution

The fourth proportional to 21,280.36, 29,368.18 and 12,330.68 is: 17,017.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.36 : 29,368.18 = 12,330.68 : x
  2. Step 2: Convert to fraction form
    21,280.36/29,368.18 = 12,330.68/x
  3. Step 3: Cross multiply
    21,280.36x = 29,368.18 × 12,330.68
  4. Step 4: Simplify right side
    21,280.36x = 362,129,629.76
  5. Step 5: Solve for x
    x = 362,129,629.76/21,280.36
  6. Step 6: Final answer
    x = 17,017.08

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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.