Home / 20,421,035.28-28,181,034.54-11,128,607.91

Finding the Fourth Proportional to 20,421,035.28, 28,181,034.54 and 11,128,607.91

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Solution

The fourth proportional to 20,421,035.28, 28,181,034.54 and 11,128,607.91 is: 15,357,482.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,035.28 : 28,181,034.54 = 11,128,607.91 : x
  2. Step 2: Convert to fraction form
    20,421,035.28/28,181,034.54 = 11,128,607.91/x
  3. Step 3: Cross multiply
    20,421,035.28x = 28,181,034.54 × 11,128,607.91
  4. Step 4: Simplify right side
    20,421,035.28x = 313,615,683,893,827.19
  5. Step 5: Solve for x
    x = 313,615,683,893,827.19/20,421,035.28
  6. Step 6: Final answer
    x = 15,357,482.11

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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.