Home / 21,038.00-29,031.81-11,478.08

Finding the Fourth Proportional to 21,038.00, 29,031.81 and 11,478.08

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Solution

The fourth proportional to 21,038.00, 29,031.81 and 11,478.08 is: 15,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.00 : 29,031.81 = 11,478.08 : x
  2. Step 2: Convert to fraction form
    21,038.00/29,031.81 = 11,478.08/x
  3. Step 3: Cross multiply
    21,038.00x = 29,031.81 × 11,478.08
  4. Step 4: Simplify right side
    21,038.00x = 333,229,279.27
  5. Step 5: Solve for x
    x = 333,229,279.27/21,038.00
  6. Step 6: Final answer
    x = 15,839.40

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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.