Finding the Fourth Proportional to 21,369,237.60, 31,899,123.98 and 18,783,555.68
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Solution
The fourth proportional to 21,369,237.60, 31,899,123.98 and 18,783,555.68 is: 28,039,323.75
Step by Step Solution
- Step 1: Write the proportion equation
21,369,237.60 : 31,899,123.98 = 18,783,555.68 : x - Step 2: Convert to fraction form
21,369,237.60/31,899,123.98 = 18,783,555.68/x - Step 3: Cross multiply
21,369,237.60x = 31,899,123.98 × 18,783,555.68 - Step 4: Simplify right side
21,369,237.60x = 599,178,971,421,553.25 - Step 5: Solve for x
x = 599,178,971,421,553.25/21,369,237.60 - Step 6: Final answer
x = 28,039,323.75
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.