Home / 21,567.85-29,779.85-21,223.40

Finding the Fourth Proportional to 21,567.85, 29,779.85 and 21,223.40

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Solution

The fourth proportional to 21,567.85, 29,779.85 and 21,223.40 is: 29,304.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,567.85 : 29,779.85 = 21,223.40 : x
  2. Step 2: Convert to fraction form
    21,567.85/29,779.85 = 21,223.40/x
  3. Step 3: Cross multiply
    21,567.85x = 29,779.85 × 21,223.40
  4. Step 4: Simplify right side
    21,567.85x = 632,029,668.49
  5. Step 5: Solve for x
    x = 632,029,668.49/21,567.85
  6. Step 6: Final answer
    x = 29,304.25

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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.