Home / 21,023.81-29,019.89-12,528.60

Finding the Fourth Proportional to 21,023.81, 29,019.89 and 12,528.60

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Solution

The fourth proportional to 21,023.81, 29,019.89 and 12,528.60 is: 17,293.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.81 : 29,019.89 = 12,528.60 : x
  2. Step 2: Convert to fraction form
    21,023.81/29,019.89 = 12,528.60/x
  3. Step 3: Cross multiply
    21,023.81x = 29,019.89 × 12,528.60
  4. Step 4: Simplify right side
    21,023.81x = 363,578,386.11
  5. Step 5: Solve for x
    x = 363,578,386.11/21,023.81
  6. Step 6: Final answer
    x = 17,293.65

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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.