Home / 21,045.51-31,569.63-7,898.22

Finding the Fourth Proportional to 21,045.51, 31,569.63 and 7,898.22

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Solution

The fourth proportional to 21,045.51, 31,569.63 and 7,898.22 is: 11,847.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.51 : 31,569.63 = 7,898.22 : x
  2. Step 2: Convert to fraction form
    21,045.51/31,569.63 = 7,898.22/x
  3. Step 3: Cross multiply
    21,045.51x = 31,569.63 × 7,898.22
  4. Step 4: Simplify right side
    21,045.51x = 249,343,883.06
  5. Step 5: Solve for x
    x = 249,343,883.06/21,045.51
  6. Step 6: Final answer
    x = 11,847.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.