Home / 21,521.77-29,699.80-12,570.59

Finding the Fourth Proportional to 21,521.77, 29,699.80 and 12,570.59

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Solution

The fourth proportional to 21,521.77, 29,699.80 and 12,570.59 is: 17,347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.77 : 29,699.80 = 12,570.59 : x
  2. Step 2: Convert to fraction form
    21,521.77/29,699.80 = 12,570.59/x
  3. Step 3: Cross multiply
    21,521.77x = 29,699.80 × 12,570.59
  4. Step 4: Simplify right side
    21,521.77x = 373,344,051.71
  5. Step 5: Solve for x
    x = 373,344,051.71/21,521.77
  6. Step 6: Final answer
    x = 17,347.28

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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.